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   9604篇
  免费   702篇
  国内免费   17篇
耳鼻咽喉   216篇
儿科学   303篇
妇产科学   262篇
基础医学   1212篇
口腔科学   216篇
临床医学   1037篇
内科学   1907篇
皮肤病学   63篇
神经病学   1005篇
特种医学   254篇
外国民族医学   2篇
外科学   1461篇
综合类   177篇
一般理论   7篇
预防医学   940篇
眼科学   170篇
药学   573篇
  2篇
中国医学   10篇
肿瘤学   506篇
  2021年   130篇
  2020年   101篇
  2019年   154篇
  2018年   149篇
  2017年   120篇
  2016年   124篇
  2015年   171篇
  2014年   212篇
  2013年   289篇
  2012年   419篇
  2011年   510篇
  2010年   286篇
  2009年   260篇
  2008年   431篇
  2007年   453篇
  2006年   401篇
  2005年   409篇
  2004年   385篇
  2003年   375篇
  2002年   384篇
  2001年   291篇
  2000年   281篇
  1999年   234篇
  1998年   91篇
  1997年   88篇
  1996年   75篇
  1995年   89篇
  1994年   74篇
  1993年   87篇
  1992年   210篇
  1991年   220篇
  1990年   206篇
  1989年   187篇
  1988年   174篇
  1987年   180篇
  1986年   178篇
  1985年   169篇
  1984年   125篇
  1983年   110篇
  1982年   74篇
  1980年   73篇
  1979年   131篇
  1978年   98篇
  1977年   70篇
  1976年   78篇
  1975年   82篇
  1974年   79篇
  1973年   76篇
  1972年   90篇
  1971年   75篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
ContextIt is especially important that patients are well informed when making high-stakes, preference-sensitive decisions like those on the Physician Orders for Life-Sustaining Treatment (POLST) form. However, there is currently no way to easily evaluate whether patients understand key concepts when making these important decisions.ObjectivesTo develop a POLST knowledge survey.MethodsExpert (n = 62) ratings of key POLST facts were used to select items for a POLST knowledge survey. The survey was administered to nursing facility residents (n = 97) and surrogate decision-makers (n = 112). A subset (n = 135) were re-administered the survey after a standardized advance care planning discussion to assess the scale's responsiveness to change.ResultsThe 19-item survey demonstrated adequate reliability (α = 0.72.). Residents' scores (x = 11.4, standard deviation 3.3) were significantly lower than surrogate scores (x = 14.7, standard deviation 2.5) (P < 0.001). Scores for both groups increased significantly after administration of a standardized advance care planning discussion (P < 0.001). Although being a surrogate, age, race, education, cognitive functioning, and health literacy were significantly associated with higher POLST Knowledge Survey scores in univariate analyses, only being a surrogate (P < 0.001) and being white (P = 0.028) remained significantly associated with higher scores in multivariate analyses.ConclusionThe 19-item POLST Knowledge Survey demonstrated adequate reliability and responsiveness to change. Findings suggest the survey could be used to identify knowledge deficits and provide targeted education to ensure adequate understanding of key clinical decisions when completing POLST.  相似文献   
2.
The resolution of three 2-substituted derivatives of idazoxan is described. The enantiomers show large separations in activity in a variety of in vitro and in vivo tests, and the active isomers are all potent and selective antagonists at the alpha 2-adrenoreceptor. The significance of these results in relation to those published on the enantiomers of idazoxan and to those on optically active alpha 2-adrenoreceptor agonists is discussed.  相似文献   
3.
Smoking behavior among participants in the nurses' health study.   总被引:2,自引:1,他引:1       下载免费PDF全文
We analyzed smoking behavior of 91,651 married female nurses, aged 30-55 years in 1976. The prevalence of smoking was similar among all birth cohorts. The largest percentage increase in starting to smoke occurred between ages 15 and 25 years; by age 25, 50 per cent had started smoking. The cessation rate was lowest in earlier birth cohorts and among nurses starting to smoke at earlier ages. The cessation rate increased substantially between 1963-73 compared with the period 1948-58.  相似文献   
4.
5.
6.
7.
IPEX (immunodysregulation, polyendocrinopathy, enteropathy, X linked syndrome) is a rare disorder which usually results in death in early infancy or childhood. Clinical awareness remains the cornerstone of diagnosis, and provided that the diagnosis is entertained, mutation analysis for FOXP3 gene mutations can be confirmatory. Two new patients in whom IPEX was diagnosed retrospectively are reported.  相似文献   
8.
9.
INTRODUCTION: An endovascular procedure for excluding an aorto-iliac aneurysm whilst simultaneously preserving one internal iliac artery is described in a patient with complex iliac pathology. REPORT: The procedure involved the use of Advanta V12 covered stents to bridge the gap between the contralateral limb of the main body of a custom-made Zenith stent graft and the internal iliac artery on the side of an external iliac artery occlusion. DISCUSSION: Minimal modifications to the standard design of modular stent grafts make it possible to treat high risk patient with complex pathology with minimal morbidity.  相似文献   
10.
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