首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   4390129篇
  免费   354879篇
  国内免费   15635篇
耳鼻咽喉   61986篇
儿科学   135925篇
妇产科学   114105篇
基础医学   668069篇
口腔科学   121141篇
临床医学   399192篇
内科学   796944篇
皮肤病学   104863篇
神经病学   377374篇
特种医学   174882篇
外国民族医学   925篇
外科学   667827篇
综合类   127480篇
现状与发展   24篇
一般理论   2688篇
预防医学   370609篇
眼科学   103368篇
药学   309531篇
  24篇
中国医学   11553篇
肿瘤学   212133篇
  2021年   56985篇
  2020年   36240篇
  2019年   59701篇
  2018年   74888篇
  2017年   57171篇
  2016年   63761篇
  2015年   76823篇
  2014年   112030篇
  2013年   178112篇
  2012年   127114篇
  2011年   131289篇
  2010年   126393篇
  2009年   128935篇
  2008年   117486篇
  2007年   124916篇
  2006年   133801篇
  2005年   128835篇
  2004年   129317篇
  2003年   119390篇
  2002年   109674篇
  2001年   154867篇
  2000年   150922篇
  1999年   140012篇
  1998年   71880篇
  1997年   68204篇
  1996年   65972篇
  1995年   61812篇
  1994年   55899篇
  1993年   51892篇
  1992年   103782篇
  1991年   99154篇
  1990年   94210篇
  1989年   91852篇
  1988年   85450篇
  1987年   83907篇
  1986年   79599篇
  1985年   78058篇
  1984年   66097篇
  1983年   58995篇
  1982年   48288篇
  1981年   45013篇
  1980年   42289篇
  1979年   57920篇
  1978年   47125篇
  1977年   41675篇
  1976年   38737篇
  1975年   37911篇
  1974年   42475篇
  1973年   40609篇
  1972年   38056篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
101.
102.
103.
104.
105.
Abstract

Objective: To understand the origin of extremely high gonadotropin levels in a perimenopausal woman.

Methods: A 52-year-old woman with a 2?months of amenorrhea followed spontaneous menstrual cycles recovery was referred to our outpatient clinic with elevated follicle-stimulating hormone (FSH, 483 mUI/ml), luteinizing hormone (LH, 475 mUI/ml) and prolactin (PRL, 173?ng/ml). She was known to take levosulpiride. The gonadotropin levels did not fit with the clinical features.

Results: A gonadotroph tumor was ruled out. Further analysis confirmed constantly high FSH, LH and PRL levels. The measurements were repeated using different analytical platforms with different results. After serial dilutions, nonlinearity was present suggesting an immunoassay interference. After post-polyethylene glycol recovery, hormone levels appeared in the normal range. Anti-goat antibodies were recognized in the serum of the patient.

Conclusions: This case report shows a case of falsely abnormal high gonadotropin and PRL levels in a woman during menopause transition. In the clinical practice the evaluation of gonadotropin profile is not recommended at this age, but the abnormal levels stimulated further evaluation. An interference in the assay due to anti-goat antibodies resulted in abnormally high level of FSH and LH. A strict collaboration between clinicians and the laboratory is needed, when laboratory findings do not correspond to clinical findings.  相似文献   
106.
107.
Acute lung injury (ALI) caused by systemic inflammatory response remains a leading cause of morbidity and mortality in critically ill patients. Management of patients with sepsis is largely limited to supportive therapies, reflecting an incomplete understanding of the underlying pathophysiology. Furthermore, there have been limited advances in the treatments for ALI. In this study, lung function and a histological analysis were performed to evaluate the impact of transient receptor potential vanilloid‐1 receptor (TRPV1) antagonist (capsazepine; CPZ) on the lipopolysaccharide (LPS)‐induced lung injury in mice. For this, adult mice pre‐treated with CPZ or vehicle received intraperitoneal injections of LPS or saline and 24 hr after, the mice were anaesthetized, and lung mechanics was evaluated. The LPS‐challenged mice exhibited substantial mechanical impairment, characterized by increases in respiratory system resistance, respiratory system elastance, tissue damping and tissue elastance. The pre‐treatment with CPZ prevented the increase in respiratory system resistance and decreased the increase in tissue damping during endotoxemia. In addition, mice pre‐treated with CPZ had an attenuated lung injury evidenced by reduction on collapsed area of the lung parenchyma induced by LPS. This suggests that the TRPV1 antagonist capsazepine has a protective effect on lung mechanics in ALI during endotoxemia and that it may be a target for enhanced therapeutic efficacy in ALI.  相似文献   
108.
109.
110.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号