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   2599182篇
  免费   201079篇
  国内免费   6345篇
耳鼻咽喉   34870篇
儿科学   86176篇
妇产科学   73006篇
基础医学   375140篇
口腔科学   74916篇
临床医学   241425篇
内科学   500057篇
皮肤病学   54255篇
神经病学   213456篇
特种医学   99192篇
外国民族医学   804篇
外科学   378113篇
综合类   62361篇
现状与发展   4篇
一般理论   958篇
预防医学   212750篇
眼科学   59023篇
药学   194528篇
  9篇
中国医学   5427篇
肿瘤学   140136篇
  2018年   27419篇
  2017年   21037篇
  2016年   23196篇
  2015年   26655篇
  2014年   36749篇
  2013年   56751篇
  2012年   77229篇
  2011年   81876篇
  2010年   48044篇
  2009年   45080篇
  2008年   76578篇
  2007年   80860篇
  2006年   81496篇
  2005年   79109篇
  2004年   76703篇
  2003年   73179篇
  2002年   71531篇
  2001年   116992篇
  2000年   120890篇
  1999年   102053篇
  1998年   28853篇
  1997年   26231篇
  1996年   25959篇
  1995年   25084篇
  1994年   23566篇
  1993年   22260篇
  1992年   83416篇
  1991年   81622篇
  1990年   79445篇
  1989年   76293篇
  1988年   70972篇
  1987年   69643篇
  1986年   66414篇
  1985年   63953篇
  1984年   48091篇
  1983年   41302篇
  1982年   24693篇
  1981年   21985篇
  1979年   45121篇
  1978年   31714篇
  1977年   26535篇
  1976年   25346篇
  1975年   26569篇
  1974年   32468篇
  1973年   31439篇
  1972年   28938篇
  1971年   27170篇
  1970年   25043篇
  1969年   23257篇
  1968年   21754篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
22.
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   
23.
24.
25.
26.
There is a large and growing population of long-term cancer survivors. Primary care physicians (PCPs) are playing an increasingly greater role in the care of these patients across the continuum of cancer survivorship. In this role, PCPs are faced with the responsibility of managing a range of medical and psychosocial late effects of cancer treatment. In particular, the sexual side effects of treatment which are common and have significant impact on quality of life for the cancer survivor, often go unaddressed. This is an area of clinical care and research that has received increasing attention, highlighted by the presentation of this special issue on Cancer and Sexual Health. The aims of this review are 3-fold. First, we seek to overview common presentations of sexual dysfunction related to major cancer diagnoses in order to give the PCP a sense of the medical issues that the survivor may present with. Barriers to communication about sexual health issues between patient/PCPs in order are also described in order to emphasize the importance of PCPs initiating this important conversation. Next, we provide strategies and resources to help guide the PCP in the management of sexual dysfunction in cancer survivors. Finally, we discuss case examples of survivorship sexual health issues and highlight the role that a PCP can play in each of these case examples.  相似文献   
27.
28.
29.
BackgroundThe aim of this paper is to assess the current state of quality and outcomes measures being reported for hepatic resections in the recent literature.MethodsMedline and PubMed databases were searched for English language articles published between 1 January 2002 and 30 April 2013. Two examiners reviewed each article and relevant citations for appropriateness of inclusion, which excluded papers of liver donor hepatic resections, repeat hepatectomies or meta-analyses. Data were extracted and summarized by two examiners for analysis.ResultsFifty-five studies were identified with suitable reporting to assess peri-operative mortality in hepatic resections. In only 35% (19/55) of the studies was the follow-up time explicitly stated, and in 47% (26/55) of studies peri-operative mortality was limited to in-hospital or 30 days. The time period in which complications were captured was not explicitly stated in 19 out of 28 studies. The remaining studies only captured complications within 30 days of the index operation (8/28). There was a paucity of quality literature addressing truly patient-centred outcomes.ConclusionQuality outcomes after a hepatic resection are inconsistently reported in the literature. Quality outcome studies for a hepatectomy should report mortality and morbidity at a minimum of 90 days after surgery.  相似文献   
30.
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