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   4358773篇
  免费   338448篇
  国内免费   14737篇
耳鼻咽喉   60293篇
儿科学   139432篇
妇产科学   114226篇
基础医学   666734篇
口腔科学   118012篇
临床医学   397065篇
内科学   790511篇
皮肤病学   107745篇
神经病学   368343篇
特种医学   169454篇
外国民族医学   753篇
外科学   656123篇
综合类   121284篇
现状与发展   24篇
一般理论   2615篇
预防医学   360399篇
眼科学   100899篇
药学   307608篇
  26篇
中国医学   11937篇
肿瘤学   218475篇
  2021年   56199篇
  2020年   35829篇
  2019年   58826篇
  2018年   74395篇
  2017年   56995篇
  2016年   63120篇
  2015年   76068篇
  2014年   110293篇
  2013年   175815篇
  2012年   124310篇
  2011年   129002篇
  2010年   125886篇
  2009年   127617篇
  2008年   115205篇
  2007年   122471篇
  2006年   131274篇
  2005年   125359篇
  2004年   126690篇
  2003年   116883篇
  2002年   106109篇
  2001年   166934篇
  2000年   162010篇
  1999年   148662篇
  1998年   71663篇
  1997年   67607篇
  1996年   65624篇
  1995年   61045篇
  1994年   54969篇
  1993年   51014篇
  1992年   106617篇
  1991年   101379篇
  1990年   97241篇
  1989年   94811篇
  1988年   87138篇
  1987年   85307篇
  1986年   80193篇
  1985年   78354篇
  1984年   65395篇
  1983年   58197篇
  1982年   47190篇
  1981年   43856篇
  1980年   41072篇
  1979年   55102篇
  1978年   44754篇
  1977年   39980篇
  1976年   36836篇
  1975年   36804篇
  1974年   39608篇
  1973年   37749篇
  1972年   35359篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
71.
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   
72.
73.
74.
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   
75.
76.
77.
78.
79.
80.
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   
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