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   2548456篇
  免费   201177篇
  国内免费   3863篇
耳鼻咽喉   34603篇
儿科学   84270篇
妇产科学   72242篇
基础医学   370379篇
口腔科学   74568篇
临床医学   232592篇
内科学   492932篇
皮肤病学   55203篇
神经病学   206273篇
特种医学   98700篇
外国民族医学   713篇
外科学   375009篇
综合类   59512篇
现状与发展   5篇
一般理论   1062篇
预防医学   205607篇
眼科学   58359篇
药学   190915篇
  9篇
中国医学   4481篇
肿瘤学   136062篇
  2018年   25233篇
  2016年   21647篇
  2015年   25083篇
  2014年   34593篇
  2013年   53130篇
  2012年   71821篇
  2011年   76323篇
  2010年   44734篇
  2009年   42930篇
  2008年   72488篇
  2007年   77004篇
  2006年   77337篇
  2005年   75392篇
  2004年   73559篇
  2003年   70501篇
  2002年   68654篇
  2001年   113944篇
  2000年   117297篇
  1999年   99627篇
  1998年   27938篇
  1997年   25407篇
  1996年   25674篇
  1995年   24743篇
  1994年   23135篇
  1993年   21790篇
  1992年   81582篇
  1991年   79672篇
  1990年   77727篇
  1989年   75284篇
  1988年   69857篇
  1987年   68756篇
  1986年   65624篇
  1985年   63006篇
  1984年   47530篇
  1983年   41415篇
  1982年   24484篇
  1981年   22065篇
  1980年   20793篇
  1979年   45487篇
  1978年   32309篇
  1977年   27237篇
  1976年   25566篇
  1975年   27190篇
  1974年   33152篇
  1973年   32215篇
  1972年   29957篇
  1971年   28105篇
  1970年   26131篇
  1969年   24752篇
  1968年   22728篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
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   
83.
84.
85.
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   
86.
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   
87.
88.
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   
89.
90.
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