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   2546691篇
  免费   201222篇
  国内免费   3862篇
耳鼻咽喉   34614篇
儿科学   84234篇
妇产科学   72280篇
基础医学   370215篇
口腔科学   74553篇
临床医学   232272篇
内科学   492377篇
皮肤病学   55193篇
神经病学   206201篇
特种医学   98700篇
外国民族医学   713篇
外科学   375008篇
综合类   59479篇
现状与发展   5篇
一般理论   1060篇
预防医学   205380篇
眼科学   58354篇
药学   190806篇
  8篇
中国医学   4478篇
肿瘤学   135845篇
  2018年   25232篇
  2016年   21633篇
  2015年   25079篇
  2014年   34582篇
  2013年   53108篇
  2012年   71800篇
  2011年   76297篇
  2010年   44718篇
  2009年   42918篇
  2008年   72449篇
  2007年   76966篇
  2006年   77300篇
  2005年   75398篇
  2004年   73579篇
  2003年   70481篇
  2002年   68654篇
  2001年   113938篇
  2000年   117272篇
  1999年   99621篇
  1998年   27919篇
  1997年   25403篇
  1996年   25681篇
  1995年   24739篇
  1994年   23135篇
  1993年   21789篇
  1992年   81563篇
  1991年   79666篇
  1990年   77717篇
  1989年   75274篇
  1988年   69860篇
  1987年   68748篇
  1986年   65635篇
  1985年   63008篇
  1984年   47536篇
  1983年   41439篇
  1982年   24499篇
  1981年   22086篇
  1980年   20807篇
  1979年   45516篇
  1978年   32336篇
  1977年   27258篇
  1976年   25572篇
  1975年   27194篇
  1974年   33151篇
  1973年   32217篇
  1972年   29970篇
  1971年   28119篇
  1970年   26147篇
  1969年   24765篇
  1968年   22732篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
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   
84.
85.
86.
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   
87.
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   
88.
89.
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   
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