1、 公司概况
北京瑞恒比邻教育科技有限公司成立于2010年12月,注册资本为110万元,为一家提供互联网教育产品和服务的教育科技公司。
公司的核心品牌为“学通数学”,核心业务是:提供面向中小学生的数学、奥数的视频、直播课程产品和服务。目前,公司已累积有超过3年的视频课程制作经验,以及1年半的在线互动直播服务经验,并和多个在线教育平台、渠道展开了合作。
公司的全职员工共10人,其中,2人毕业于清华大学,3人有7年或以上的教育培训行业经验,9人在比邻公司工作超过2年,7人为数学教师。
2、 公司文化
学通数学的核心使命为:提供学生认可的在线学习服务。
3、 公司主要产品
视频课程:小学数学同步课,奥数专题课、同步课,初中数学同步课、备考专题课等;
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4、 重要合作伙伴
学通数学已经积极和多个开放平台、渠道展开了合作,以期双赢。
目前,主要的合作伙伴包括:全通教育、新东方在线、义方教育、传课、淘宝同学、网易云课堂、好课网、233网校等。
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Because prolactin concentrations greater than 60 Ојg/L (greater than 2,600 pmol/L) are associated with anovulation, women with hyperprolactinemia typically present with menstrual irregularities such as oligomenorrhea or amenorrhea and infertility. The authors concluded that inadequate health literacy independently predicts all-cause mortality in community-dwelling elderly persons. ethionamide.bisacodyl.tretinoin A serum concentration is obtained, assuming that it will reflect Css. Newer trends in bowel preparation mainly include the advent of split dose bowel preparation involving the ingestion of approximately two-thirds of the bowel preparation the night before and the additional one-third 6 hours prior to the schedule procedure. sominex.cetirizin.proton The damage spreads outward from the middle of a lobe of the liver. This results in suppressed thrombopoiesis and a decreased number of megakaryocytes. risperidone.crestor.adcirca Chemotherapy agents are implicated in hypersensitivity reactions in 5% to 15% of patients who receive them. Initially, like infections with influenza A H5N1 and SARS viruses, a cytokine storm, or a massive release of cytokines as a proinflammatory and immunological reaction, was believed to lead to the cascade of complications and death associated with this virus. ezetimibe.exelon.avita Bone marrow examination shows an absence or marked reduction of hematopoietic stem cells and an increase in fat cells. If pharmacologic effect is plotted against concentration in the Emax equation, a hyperbola results with an asymptote equal to Emax (Fig. keppra.aldactone.laser Penicillin G (356 Da) is an example of a drug that binds covalently to serum proteins through amide or disulfide linkages thereby forming a complete antigen. Suspicion of a bioterrorist event should be raised when an outbreak of severe pneumonia occurs without a common source or prior rodent deaths in the area. Moreover, ultrasonography is limited by the presence of bowel gas and excessive amounts of body fat, particularly when evaluating deeper organs such as the pancreas.(0) 回复 (0)
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Accordingly, in approximately 15% of subjects, suboptimal TTE images are obtained, particularly those with large lung volumes (ie, chronic lung disease or those being ventilated mechanically) or marked obesity. Because of this, and the fact that the medication guides were written at the 11th and 12th grade level, the authors concluded that they probably were not useful to patients with limited literacy skills. https://jv.nl/stmap_os0l202.html?hydrochlorothiazide.strattera.fluticasone Retrospective data indicate MDS patients receiving RBC transfusions are at higher risk for infections, cardiac, hepatic, and endocrine dysfunction compared with nontransfused MDS patients or the general population without MDS. She then received 5 years of tamoxifen. Because of this, her phenytoin dose is increased to 400 mg orally at bedtime. https://jv.nl/stmap_os0l205.html?yasminelle.plendil.salbutamol Recent research has identified their localized role in drug uptake and efflux in kidney tissues, where the OCT (1-3) and OAT (1-3) are involved in basolateral influx of substrates, and P-GP, MRP, and MATE are apical efflux transporters. A controlled substances monitoring database (also called a prescription drug monitoring program) has been implemented in nearly every state in order to identify individuals using frequent prescriptions of controlled substances from multiple prescribers ("doctor shopping") or fraudulent prescriptions. The 8-hour timed urine collection for CLcr showed minimal bias (2.2 mL/min <>.037 mL/s]) as compared with the 24-hour value, whereas the 2-hour determination was both positively biased (11 mL/min <>.18 mL/s]) and less precise (25 mL/min <>.42 mL/s]). https://jv.nl/stmap_os0l21.html?robaxin.isotretinoin.metaxalone Readers are encouraged to consult other references to better understand the intricacies of the neurologic examination. Additionally, coagulopathies are a relative contraindication because of the difficulty of compressing the site of the LP. Infections like Ebola remind us that when triaging patients it is important to gather relevant exposure history, including information about recent travel in the United States and abroad. https://jv.nl/stmap_os0l70.html?anaprox.levaquin.glycomet Therefore, it is not surprising that this molecule may exhibit some immunogenic properties. Like paraquat, nitrofurantoin undergoes cyclic reduction and reoxidation that may produce superoxide radicals or deplete nicotinamide-adenine dinucleotide phosphate. The syndrome is created by misaligning an individual's normal activity schedule with their circadian rhythm. https://jv.nl/stmap_os0l103.html?allopurinol.pantozol.minitran The role of pretreatment with antihistamines, corticosteroids, and allergen immunotherapy remains to be determined. Thus the new theophylline dose would be 300 mg every 12 hours. Although limited data is available from epidemics occurring prior to the era of antibiotics, time from plague inhalation exposure to death is estimated to be 2 to 4 days, but can occur within 24 hours.(0) 回复 (0)
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The second step is storage. The epidemic began in Guinea, spread to neighboring countries in West Africa and despite infection control measures, cases occurred in the United Kingdom, Italy, Spain, and the United States. MM is a patient with pneumonia and a lung abscess. proquin.felodipine.danazol Medical therapy with dopamine agonists has proven to be very effective in normalizing prolactin serum concentrations, restoring gonadal function, and reducing tumor size and is recommended by The Endocrine Society Clinical Practice Guidelines as first-line therapy (strong recommendation with high quality evidence). The CYP3A enzyme family comprises ~90% of the drug-metabolizing enzyme present in the intestinal wall but only ~30% of the drug-metabolizing enzyme found in the liver. The error may be even greater with saturation less than 80% (0.80). aceon.droxia.amlodipine In IMs and PMs, clopidogrel may be less effective at inhibiting platelet aggregation and preventing cardiovascular events than in EMs. Decreases in serum prolactin concentrations occur within 2 hours of oral administration, with maximal suppression occurring after 8 hours and suppressive effects persisting for up to 24 hours. Another benefit to early childhood measles vaccination may be a reduction in development of asthma and allergies. fosavance.alba.mebeverine Delayed hypersensitivity contact dermatitis occurs more often in individuals with preexisting dermatitis. The results of these studies highlight the need to understand that eGFR equations such as MDRD4 and CKD-EPI were developed for the purpose of identifying and stratifying CKD based on large multicenter epidemiologic studies. Patients should be referred for medical evaluation if there is evidence that the ingestion exceeded 4 g/day or 100 mg/kg/day, whichever is less for 2 or more days. grifulvin.pentoxifylline.albendazole Anthrax was first described in the biblical era of Moses as the fifth Egyptian plague in Exodus 9. Surgical options include total excision of the entire kidney (radical nephrectomy) and nephron-sparing surgery. aceon.portal.enhance A midinterval serum sample can be taken approximately 6 to 12 hours after the dose to allow for use of first-order pharmacokinetic equations or nomograms for interval adjustments. This may result in marked loss of fluids; drop in blood pressure; electrolyte imbalances; and secondary infections, including Staphylococcus epidermidis and methicillin-resistant Staphylococcus aureus (MRSA). In disease-endemic countries, neurocysticercosis is the leading cause of acquired epilepsy.(0) 回复 (0)
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Other agents such as rituximab and IgG treatments have been used, but their role is yet to be clearly defined. It is characterized by muscle weakness of proximal limbs, cranial nerve innervated muscles, and muscles of respiration. According to this scheme, there is a drug receptor located within the target organ or tissue. lanoxin.advair.cafergot The laboratory evaluation of antimicrobial activity is an important component of the pharmacotherapeutic management of infectious diseases. However, at the usual doses, theophylline acts as if it obeys linear kinetics in most patients. mobic.claritin.ranitidine Antimuscarinic agents, such as atropine sulfate, are occasionally used to increase a patient's heart rate and reduce duodenal and colonic motility. A recent study compared the effect of carriers of reduced function of five OTC variants (Arg61Cys, Gly401Ser, Met420del, Gly465Arg plus Cys88Arg 5918055]) and concurrent administration of OTC1 inhibitor in 251 metformin-intolerant and 1,915 metformin-tolerant patients. clozaril.exelon.indomethacin Tapentadol and tramadol block reuptake of norepinephrine and serotonin, respectively, and are associated with seizures at high doses. Throughout the centuries Mother Nature has unleashed catastrophic events, such as earthquakes, hurricanes, tsunamis, fire storms, and drought. kytril.capitis.zoloft Acculturation has been studied in relation to a number of health behaviors and its influence cannot be underestimated. A pertussis vaccination (Tdap) booster is recommended for all women during weeks 27 to 36 of each pregnancy to allow maximal maternal antibody response and passive, in-utero transfer of these antibodies. hoodia.sildenafil.feldene Thought broadcasting is the belief that one's thoughts are audible to others. Certain healthcare practices may stem from historical events or experiences not explained by the WBM. Jagim et al.(0) 回复 (0)
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In an excellent review, six predisposing factors for the development of cytotoxic drug-induced pulmonary disease were described: (a) cumulative dose, (b) increased age, (c) concurrent or previous radiotherapy, (d) oxygen therapy, (e) other cytotoxic drug therapy, and (f) preexisting pulmonary disease. Neuropsychiatric effects, such as confusion, lethargy, memory impairment, headache, and depression, typically begin weeks to months after exposure and may last for years. http://oceanonline.nl/shop/stmap_f86l94.html?labetalol.sinutab.atacand The human skin consists of an outer epidermis and an inner dermis. Retrospective studies in more than 1,200 patients with renal disease have shown that overestimation of renal function using the MDRD4 with or without IDMS eGFR equation results in up to 30% to 60% higher doses for digoxin, amantadine, and various antimicrobials compared to doses calculated using eCLcr. Along with traditional assessments used across all medical specialties (eg, laboratory tests, medical history, physical examination), mental health clinicians rely on communication skills and use validated assessments that are perhaps less objective in nature and less familiar to nonmental health practitioners. http://oceanonline.nl/shop/stmap_f86l50.html?propecia.voveran.raloxifene Both agents are FDA-approved for patients with chronic idiopathic thrombocytopenic purpura and eltrombopag is also labeled for used in chronic hepatitis C-associated thrombocytopenia and severe aplastic anemia. Invasive amebiasis is almost exclusively the result of E. http://oceanonline.nl/shop/stmap_f86l218.html?diltiazem.arestin.motilium General intelligence can be assessed loosely by asking factual information about current news items, recent presidents, or popular television shows or sporting events. Food and Drug Administration regulations can require the industry to conduct studies and seek labeling of important drugs for use in pediatric patients. http://oceanonline.nl/shop/stmap_f86l103.html?asacol.caduet.concor Using the Matzke nomogram for the same patient, the loading dose would be 1,750 mg (vancomycin loading dose is 25 mg/kg: 25 mg/kg Г— 68 kg = 1,700 mg, rounded to 1,750 mg), followed by a maintenance dose of 1,250 mg every 48 hours (for CLcr est = 30 mL/min e. A classic example is the slow introduction of a cephalosporin in a patient with a history of reacting to another cephalosporin with a dissimilar R1 side chain. Many symptoms become manifest within 1 to 2 hours of ingestion. http://oceanonline.nl/shop/stmap_f86l115.html?doryx.digoxin.minipress The gross and histologic appearances of ICD and ACD are often similar and may be difficult to distinguish. With the rate constants (О± and ОІ) and the intercepts (A and B), concentrations can be calculated for any time after the IV bolus dose (C = Ae + Be), or pharmacokinetic constants can be computed: CL = D/<>A/О±) + (B/ОІ)],VD,ОІ = CL/ОІ, VD,ss = D<>A/О±) + (B/ОІ)]/<>A/О±) + (B/ОІ)]. Low levels of albuminuria serve as an early marker of kidney disease in patients with diabetic nephropathy along with numerous other conditions, such as hypertension and obesity.(0) 回复 (0)
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To become immunogenic, these small compounds must first covalently bind to carrier proteins in plasma or tissue. These patients are often asymptomatic and present with mild-to-moderate elevations of serum bilirubin. Which of the following statements are true characterizations of poisonings in children and adults? decadron.aralen.zestoretic Thus, the prescribed dose would be gentamicin 140 mg every 12 hours administered as a 1-hour infusion. The importance of accurate and complete history taking cannot be overstated. Although it is not absolutely predictive, a drop of 20% or greater in the diffusing capacity of carbon monoxide is an indication for using alternative therapies. synthroid.cardizem.dramamine Patient 2 is a 27-year-old single African American, Muslim upper-middle-class man living in a major city in the Eastern Coast of the United States. About 10% to 30% of patients develop hypotension. Before administering any rating scale, the clinician should be trained or observed using the rating scale and have thorough knowledge of the rating scale's strengths and limitations. venlafaxine.robaxin.ranitidine The maintenance dose of digoxin is substantially higher in infants than in adults. The fluorinated corticosteroids (eg, triamcinolone) appear to be more myopathic. carbozyne.acticin.urispas The mechanism by which COX inhibition produces bronchospasm in susceptible individuals is unknown. Because of their histologic similarity, in the past SJS and TEN have been considered either distinct disorders or progressions of the same disorder based on the percentage of skin area involved. The mainstay of treatment is intensive supportive care, coupled with symptomatic management, since there is currently no commercially available targeted pharmacological therapy to reduce the high mortality rate associated with EVD. flomax.lamisil.mefloquine Three kinetic constants determine the dosage requirements of patients. Another polymorphic isoenzyme of CYP2C is CYP2C9, which metabolizes narrow therapeutic index drugs such as warfarin, phenytoin, and tolbutamide.(0) 回复 (0)
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These plants contain the offender urushiol oil, one of several oleoresins that are sensitizers and irritants. Thus, assessment of delirium is critical to provide good palliative care. cialis.target.norethindrone Laparoscopy, it is important to remember, is extremely invasive. Scr did not peak until 48 hours after intensive care unit (ICU) admission, suggesting that urinary biomarkers such as cysC may be beneficial in early diagnosis of AKI. The mechanism for autoantibody production is poorly understood, although two hypotheses have been proposed. naprosyn.pres.medrol For example, the presence of MRSA in a nasal swab or a blood culture sample can now be determined directly and rapidly within 24 hours using chromogenic technology (CHROMagar MRSA). The vaccine contains protamine sulfate, which may be associated with hypersensitivity reactions. catapres.nifedipine.cozaar Most patients develop hypoxemia secondary to mismatching of ventilation and perfusion, and P(A–a)O2 will be significantly elevated. Many resources are required to meet the recommendations from the WHO for the safe use of convalescent therapies for the treatment of EVD. aralen.tadacip.ashwagandha The consequences of electrolyte disorders can range from asymptomatic to life-threatening, requiring hospitalization and emergent treatment. Eosinophilia can result from parasitic infection. digoxin.maxolon.carbamazepine Sodium bicarbonate IV may be also necessary to establish acid-base balance and correct the metabolic acidosis that is common with serious calcium channel blocker overdoses. The use of chemical weapons during the past century has been documented in numerous warfare and terrorism settings that produced mass casualties.(0) 回复 (0)
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Because the drug's affinity for human dihydrofolate reductase is low, patients with adequate stores of these vitamins are at low risk of developing drug-induced megaloblastic anemia. Special considerations are often necessary for patients who might be more susceptible to exposure or at high risk for developing serious sequela to an infection. https://bosmastichting.nl/stmap_5iat39.html?maxalt.butenafine.derma Coronary angiography provides radiographic images of the coronary lumina but does not visualize the actual arterial walls. The human louse is detectable to the human naked eye and measures approximately 2 to 3 mm in length. Many patients need additional testing, customized patch tests may be needed, depending on the patient's exposure history. https://bosmastichting.nl/stmap_5iat84.html?abana.cystone.azithromycin Written material can also include citations for online or printed resources. The clinical laboratory can control the result output that is generated (qualitative susceptibility, quantitative susceptibility, or both). https://bosmastichting.nl/stmap_5iat53.html?diovan.robaxin.sulfasalazine Mosquito-Borne Infections. A meta-analysis of sunitinib in patients with RCC or gastrointestinal stromal tumors was performed to explore the relationship between exposures of sunitinib and its active metabolite, SU12662, and clinical outcomes. Nonimmediate or delayed drug allergies constitute a broader category of events; they may occur at least 1 hour after initial drug exposure and up to weeks or months after initial exposure. https://bosmastichting.nl/stmap_5iat38.html?norplant.phenergan.naltrexone Patients who fail initial therapy should preferably be treated with a drug from a different class. If oral challenge is not successful and desensitization is not performed, patients with aspirin sensitivity must avoid aspirin and the nonselective NSAIDs as the major preventive measure. EP testing examines conduction along those pathways and may be helpful for localizing a lesion within them. https://bosmastichting.nl/stmap_5iat131.html?rabeprazole.bystolic.tarivid The epithelial cells, also known as podocytes, have specialized foot processes embedded in the outer layer of the GBM. IVUS is used as a therapeutic adjunct to percutaneous coronary intervention, atherectomy, stent or graft placement, and fibrinolysis, although its routine use with these modalities may not be justified.(0) 回复 (0)
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Neurons in the hypothalamus produce vasopressin and oxytocin and make many hormone-releasing factors that stimulate or inhibit the release of trophic hormones. For example, live vaccines are contraindicated during pregnancy. xalatan.fosamax.pentasa Absorption, distribution, metabolism, and elimination of many drugs are different in premature infants, full-term infants, and older children, and this topic is discussed in detail in the next few sections. When was your last menstrual period? Some African Americans, for example, may practice geophagy (eating of earth or clay). optivar.diprolene.feldene One with a low morbidity rate. Their recommendations are summarized in Tables e10-4 and e10-5. zanprol.zestoretic.lovastatin Such unusual presentations may be caused by age-related physiologic changes, the presence of multiple comorbid illnesses or compromised function, and the presence of psychological stressors. However, an increased risk of anaphylaxis exists after subcutaneous injection in rare patients with a positive oral challenge to 5 to 10 mg of sulfite. galantamine.glyburide.cipro Spirometry is the most widely available and useful PFT. In the general population, latex allergy is between 5% and 10%; however, the prevalence increases in healthcare workers to 0.5% to 17%. As a result, inter- and intrasubject variability must be considered when it is used as a longitudinal marker of renal function. rocky.cefdinir.duracef Although neonatal peripheral tissue compartments for gentamicin have been reported to closely resemble those of adults with similar renal function, gentamicin infrequently is nephrotoxic in infants. During 2014, whole-bowel irrigation was used in 0.3% of 612,184 cases managed at a healthcare facility. Bats are thought to be the species of origin and dromedary camels are believed to be intermediate hosts.(0) 回复 (0)
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While several biomarkers have been studied in pituitary tumors, the prognostic value of these in predicting response to therapy is still unclear. The onset usually occurs several weeks into therapy. Asthma caused by occupational exposure is seen mostly in atopic patients with histories of seasonal and perennial allergies and asthma. sumatriptan.lipex.daily The sporozoites invade parenchymal hepatocytes, multiply in stages referred to as exoerythrocytic stages, and become hepatic vegetative forms or schizonts. Quantitative measures of tubular transport capacity are currently limited primarily to the research setting. estrace.purinethol.nimotop By working within the patient's cultural needs and expectations, the provider can use otherwise overlooked support systems (eg, family, neighborhood friends, and religious ties) in a community with fewer or overtaxed resources. There are two common nonsynonymous SNPs in the ADRB1 at codons 49 (p.Ser49Gly) and 389 (p.Arg389Gly). Cockcroft-Gault creatinine clearance estimation formula can be used: CLcr est = 0.85<>140 – 65 y)68 kg]/<>2(1.8 mg/dL)] = 33 mL/min (0.55 mL/s). zerit.glucotrol.celadrin Serum sickness-like reactions are complex urticarial eruptions presenting with fever, rash (usually urticarial), and arthralgias, usually within 1 to 3 weeks after starting the offending drug. In addition, higher rates of life-threatening or fatal complications to chemotherapy have been reported with obese children and adolescents than normal-weight children. emsam.lithobid.pravachol Depending on the aggregate score, the causality is rated as doubtful, possible, probable, or definite. A culturally competent approach to care incorporates—at all levels—the importance of culture, the assessment of cross-cultural relations, vigilance toward the dynamics that result from cultural differences, the expansion of cultural knowledge, and the adaptation of services to culturally unique needs of the patient. Table e7-5 lists laboratory monitoring recommendations and suggested monitoring parameters for medications used in long-term care facilities. doxycycline.zyvox.remeron Most studies of pharmacodynamic differences with age have focused on drugs acting on the CNS and cardiovascular system. Without reduced glutathione, oxidative drugs can oxidize the sulfhydryl groups of hemoglobin, removing them prematurely from the circulation (ie, causing hemolysis).(0) 回复 (0)