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   3186020篇
  免费   252963篇
  国内免费   5455篇
耳鼻咽喉   45424篇
儿科学   100160篇
妇产科学   86295篇
基础医学   457697篇
口腔科学   91809篇
临床医学   295291篇
内科学   617043篇
皮肤病学   66017篇
神经病学   265264篇
特种医学   124693篇
外国民族医学   1104篇
外科学   471394篇
综合类   73752篇
现状与发展   4篇
一般理论   1435篇
预防医学   262190篇
眼科学   75219篇
药学   237573篇
  10篇
中国医学   5739篇
肿瘤学   166325篇
  2018年   32858篇
  2016年   27901篇
  2015年   31715篇
  2014年   45197篇
  2013年   69044篇
  2012年   93215篇
  2011年   98875篇
  2010年   57987篇
  2009年   55602篇
  2008年   93820篇
  2007年   100099篇
  2006年   100449篇
  2005年   98083篇
  2004年   94324篇
  2003年   90947篇
  2002年   89464篇
  2001年   142932篇
  2000年   147488篇
  1999年   124915篇
  1998年   36520篇
  1997年   33097篇
  1996年   33136篇
  1995年   31703篇
  1994年   29824篇
  1993年   27894篇
  1992年   100951篇
  1991年   98154篇
  1990年   94913篇
  1989年   91562篇
  1988年   85170篇
  1987年   83702篇
  1986年   79586篇
  1985年   75884篇
  1984年   57665篇
  1983年   49800篇
  1982年   30146篇
  1981年   26987篇
  1980年   25369篇
  1979年   54628篇
  1978年   38968篇
  1977年   32798篇
  1976年   30691篇
  1975年   32653篇
  1974年   40082篇
  1973年   38529篇
  1972年   36349篇
  1971年   33713篇
  1970年   31718篇
  1969年   29673篇
  1968年   27226篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
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   
93.
94.
95.
Pharmaceutical Chemistry Journal - Three extracts were produced from the above-ground part of the meadowsweet Filipendula ulmaria (L.) Maxim. using water, 40% ethanol, and 70% ethanol. Comparative...  相似文献   
96.
97.
Caring for patients with end-stage kidney disease (ESKD) in the United States is challenging, due in part to the complex epidemiology of the disease's progression as well as the ways in which care is delivered. As CKD progresses toward ESKD, the number of comorbidities increases and care involves multiple healthcare providers from multiple subspecialties. This occurs in the context of a fragmented US healthcare delivery system that is traditionally siloed by provider specialty, organization, as well as systems of payment and administration. This article describes the role of care fragmentation in the delivery of optimal ESKD care and identifies research gaps in the evidence across the continuum of care. We then consider the impact of care fragmentation on ESKD care from the patient and health system perspectives and explore opportunities for system-level interventions aimed at improving care for patients with ESKD.  相似文献   
98.
99.
As millions of people turn to social media for health information, better understanding the factors that guide health-related judgments and perceptions in this context is imperative. We report on two Web experiments (n > 400 total) examining the power of society’s widespread weight bias and related stereotypes to influence nutrition judgments in social media spaces. In Experiment 1, meals were judged as lower in nutritional quality when the person who recommended them (the source) was depicted as obese rather than of normal weight, an effect mediated by stereotypic beliefs about the source as a generally unhealthy person. Experiment 2 replicated this effect, which—notably—remained significant when controlling for objective nutritional information (calories and fat content). Results highlight spillover effects of weight bias that extend beyond person perception to color impressions of objects (here, food) that are associated with stigmatized attributes. Implications for everyday nutrition judgments and public health are considered.  相似文献   
100.
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