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   1475453篇
  免费   112150篇
  国内免费   2577篇
耳鼻咽喉   18697篇
儿科学   46589篇
妇产科学   38958篇
基础医学   217299篇
口腔科学   38821篇
临床医学   139320篇
内科学   291925篇
皮肤病学   30171篇
神经病学   122726篇
特种医学   54009篇
外国民族医学   276篇
外科学   211371篇
综合类   28800篇
现状与发展   3篇
一般理论   870篇
预防医学   123211篇
眼科学   33835篇
药学   107094篇
  11篇
中国医学   2321篇
肿瘤学   83873篇
  2021年   13949篇
  2019年   14473篇
  2018年   18587篇
  2017年   14140篇
  2016年   15532篇
  2015年   18019篇
  2014年   25325篇
  2013年   37600篇
  2012年   52844篇
  2011年   56043篇
  2010年   32162篇
  2009年   30306篇
  2008年   51850篇
  2007年   55197篇
  2006年   54627篇
  2005年   53909篇
  2004年   51331篇
  2003年   48806篇
  2002年   46910篇
  2001年   57856篇
  2000年   58430篇
  1999年   50096篇
  1998年   16018篇
  1997年   14433篇
  1996年   14520篇
  1995年   13716篇
  1994年   12608篇
  1993年   11783篇
  1992年   39299篇
  1991年   38652篇
  1990年   37304篇
  1989年   36091篇
  1988年   33531篇
  1987年   32858篇
  1986年   31340篇
  1985年   29636篇
  1984年   22992篇
  1983年   20151篇
  1982年   12538篇
  1979年   21575篇
  1978年   16059篇
  1977年   13343篇
  1976年   12370篇
  1975年   13219篇
  1974年   15999篇
  1973年   15707篇
  1972年   14815篇
  1971年   13786篇
  1970年   12989篇
  1969年   12218篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
62.
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   
63.
64.
65.
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   
66.
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   
67.
68.
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   
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