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   2140734篇
  免费   153973篇
  国内免费   6554篇
耳鼻咽喉   28506篇
儿科学   68814篇
妇产科学   59115篇
基础医学   308362篇
口腔科学   58553篇
临床医学   198598篇
内科学   417514篇
皮肤病学   42933篇
神经病学   176130篇
特种医学   80893篇
外国民族医学   669篇
外科学   313380篇
综合类   46088篇
现状与发展   2篇
一般理论   836篇
预防医学   175040篇
眼科学   48045篇
药学   155666篇
  8篇
中国医学   4663篇
肿瘤学   117446篇
  2021年   17174篇
  2019年   18070篇
  2018年   25107篇
  2017年   19082篇
  2016年   20690篇
  2015年   23626篇
  2014年   33021篇
  2013年   51257篇
  2012年   70142篇
  2011年   74716篇
  2010年   43806篇
  2009年   40719篇
  2008年   69016篇
  2007年   73112篇
  2006年   73023篇
  2005年   71245篇
  2004年   68000篇
  2003年   64992篇
  2002年   63475篇
  2001年   91932篇
  2000年   94449篇
  1999年   80057篇
  1998年   23648篇
  1997年   21380篇
  1996年   21051篇
  1995年   19899篇
  1994年   18669篇
  1993年   17624篇
  1992年   63483篇
  1991年   61844篇
  1990年   60084篇
  1989年   57375篇
  1988年   53258篇
  1987年   52122篇
  1986年   49815篇
  1985年   47727篇
  1984年   36257篇
  1983年   30911篇
  1982年   19156篇
  1979年   32998篇
  1978年   23546篇
  1977年   19588篇
  1976年   18994篇
  1975年   19853篇
  1974年   24018篇
  1973年   23282篇
  1972年   21666篇
  1971年   20149篇
  1970年   18908篇
  1969年   17430篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
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   
62.
63.
64.
In 1963, Goffman argued that forming a group based on shared stigma may provide benefits. However, there is no empirical research on whether perception that a separate, unique, coherent group exists (i.e., group entitativity) influences coping, such as educating others or secrecy, for the stigmatized individual or his or her spouse. Further, little is known about how spouses influence each other in terms of promoting the education of others about a stigmatizing condition, especially when it comes to the role of believing that stigma-based groups, to which they may both belong, exist. This study provides a step toward bridging this gap in the research by applying the label management model in efforts to understand coping for couples in which one spouse is diagnosed with genetic mutations leading to alpha-1 antitrypsin deficiency (AATD). This study included 50 married couples in which one spouse is diagnosed with genetic mutations leading to alpha-1 antitrypsin deficiency (AATD). We found that group entitativity related to those with AATD counterbalanced the influence of genetic stigma on spouses’ intentions to keep the diagnosis secret or to educate others about it. Intrapersonal and interpersonal influences appeared among spouses. Attention is needed on the power of creating groups for stigmatized persons and their relatives. Indeed, people live within a dynamic world of group entities, and multiple social identities including spousal and familial. While attention has been paid to the diffusion of stigmas to loved ones, less has been paid to the uplift of group entities for them.  相似文献   
65.
66.
67.
This study used the National Survey of Ambulatory Surgery (NSAS) database to measure the incidence of and risk factors for symptoms in the ambulatory surgery center and problems within 24 h after isolated carpal tunnel release (CTR). The NSAS contained records on 400,000 adult patients with carpal tunnel syndrome who were treated with CTR in 2006, based on ICD-9 codes. The type of anesthesia used and factors associated with symptoms and problems were sought in bivariate and multivariable statistical analyses. The mean duration of the procedure was 16 ± 8.8 min. Only 5 % were performed under local anesthesia without sedation, 45 % with IV sedation, 28 % regional anesthesia, and 19 % general anesthesia. Symptoms in the ambulatory surgery center or a problem within 24 h after discharge were recorded in 10 % of patients, all of them minor and transient, including difficulties with pain and its treatment. The strongest risk factors were male sex, age of 45 years and older, and participation of an anesthesiologist. Local anesthesia and regional anesthesia were associated with more perioperative symptoms and postoperative problems. Most CTR are performed with some sedation in the United States. CTR is a safe procedure: one in 10 patients will experience a minor issue in the perioperative or immediate postoperative period.  相似文献   
68.
69.
70.
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