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   1262663篇
  免费   96449篇
  国内免费   1579篇
耳鼻咽喉   16320篇
儿科学   41005篇
妇产科学   34951篇
基础医学   189504篇
口腔科学   34740篇
临床医学   117783篇
内科学   247850篇
皮肤病学   27319篇
神经病学   101885篇
特种医学   46781篇
外国民族医学   265篇
外科学   178639篇
综合类   25756篇
现状与发展   3篇
一般理论   568篇
预防医学   104677篇
眼科学   28053篇
药学   92589篇
  6篇
中国医学   2022篇
肿瘤学   69975篇
  2018年   13537篇
  2017年   10399篇
  2016年   11343篇
  2015年   13088篇
  2014年   18015篇
  2013年   27504篇
  2012年   37609篇
  2011年   40003篇
  2010年   23075篇
  2009年   22271篇
  2008年   37778篇
  2007年   40405篇
  2006年   39984篇
  2005年   39109篇
  2004年   37559篇
  2003年   35973篇
  2002年   34876篇
  2001年   56045篇
  2000年   57053篇
  1999年   48103篇
  1998年   13401篇
  1997年   12225篇
  1996年   12645篇
  1995年   11915篇
  1994年   11108篇
  1993年   10401篇
  1992年   38201篇
  1991年   37683篇
  1990年   36449篇
  1989年   35263篇
  1988年   32694篇
  1987年   32032篇
  1986年   30527篇
  1985年   28796篇
  1984年   21944篇
  1983年   19197篇
  1982年   11364篇
  1981年   10325篇
  1979年   20947篇
  1978年   15398篇
  1977年   12791篇
  1976年   11849篇
  1975年   12816篇
  1974年   15594篇
  1973年   15365篇
  1972年   14514篇
  1971年   13553篇
  1970年   12788篇
  1969年   12068篇
  1968年   11231篇
排序方式: 共有10000条查询结果,搜索用时 12 毫秒
41.
42.
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   
43.
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   
44.
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   
45.
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   
46.
47.
48.
49.
50.
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