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   2324041篇
  免费   175434篇
  国内免费   5587篇
耳鼻咽喉   30412篇
儿科学   75773篇
妇产科学   64670篇
基础医学   344260篇
口腔科学   64931篇
临床医学   223056篇
内科学   447628篇
皮肤病学   48350篇
神经病学   191334篇
特种医学   84915篇
外国民族医学   603篇
外科学   325311篇
综合类   50424篇
现状与发展   4篇
一般理论   978篇
预防医学   197676篇
眼科学   52083篇
药学   171402篇
  12篇
中国医学   4780篇
肿瘤学   126460篇
  2019年   19153篇
  2018年   26275篇
  2017年   20026篇
  2016年   21749篇
  2015年   24954篇
  2014年   34634篇
  2013年   53504篇
  2012年   73077篇
  2011年   77794篇
  2010年   45202篇
  2009年   42508篇
  2008年   72054篇
  2007年   76729篇
  2006年   76453篇
  2005年   74359篇
  2004年   71201篇
  2003年   67959篇
  2002年   65776篇
  2001年   101828篇
  2000年   104431篇
  1999年   87989篇
  1998年   25223篇
  1997年   22932篇
  1996年   22983篇
  1995年   21808篇
  1994年   20366篇
  1993年   19088篇
  1992年   70287篇
  1991年   69221篇
  1990年   67134篇
  1989年   64244篇
  1988年   59549篇
  1987年   58394篇
  1986年   55697篇
  1985年   53106篇
  1984年   40135篇
  1983年   34783篇
  1982年   20863篇
  1979年   37553篇
  1978年   27224篇
  1977年   22465篇
  1976年   21546篇
  1975年   22591篇
  1974年   27611篇
  1973年   27200篇
  1972年   25370篇
  1971年   23729篇
  1970年   22208篇
  1969年   20614篇
  1968年   19441篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
91.
92.
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   
93.
94.
95.
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   
96.
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   
97.
Nevo  N.  Goldstein  A. L.  Staierman  M.  Eran  N.  Carmeli  I.  Rayman  S.  mnouskin  Y. 《Hernia》2022,26(6):1491-1499
Hernia - The minimally invasive surgical repair of combined inguinal and ventral hernias often requires shifting from one approach or plane to another. The traditional enhanced-view totally...  相似文献   
98.
99.
100.
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