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   1959400篇
  免费   149558篇
  国内免费   3291篇
耳鼻咽喉   27130篇
儿科学   60945篇
妇产科学   55486篇
基础医学   288916篇
口腔科学   56315篇
临床医学   178928篇
内科学   375931篇
皮肤病学   41141篇
神经病学   158586篇
特种医学   75004篇
外国民族医学   419篇
外科学   288752篇
综合类   46473篇
现状与发展   4篇
一般理论   805篇
预防医学   159613篇
眼科学   45254篇
药学   145129篇
  6篇
中国医学   3434篇
肿瘤学   103978篇
  2018年   19381篇
  2016年   16579篇
  2015年   19203篇
  2014年   26943篇
  2013年   41316篇
  2012年   55922篇
  2011年   59367篇
  2010年   34513篇
  2009年   32899篇
  2008年   56106篇
  2007年   60427篇
  2006年   59910篇
  2005年   58758篇
  2004年   56885篇
  2003年   54590篇
  2002年   52939篇
  2001年   83545篇
  2000年   85070篇
  1999年   72010篇
  1998年   21008篇
  1997年   19185篇
  1996年   19467篇
  1995年   18262篇
  1994年   17280篇
  1993年   16225篇
  1992年   58934篇
  1991年   57816篇
  1990年   56330篇
  1989年   54502篇
  1988年   50895篇
  1987年   50034篇
  1986年   47591篇
  1985年   45424篇
  1984年   34934篇
  1983年   30306篇
  1982年   18510篇
  1981年   16925篇
  1979年   34360篇
  1978年   25157篇
  1977年   20992篇
  1976年   19388篇
  1975年   21125篇
  1974年   25875篇
  1973年   25189篇
  1972年   24041篇
  1971年   22271篇
  1970年   21202篇
  1969年   20188篇
  1968年   18563篇
  1967年   16862篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
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   
23.
24.
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   
25.
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   
26.
27.
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   
28.
29.
30.
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