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   4209187篇
  免费   360850篇
  国内免费   15044篇
耳鼻咽喉   60766篇
儿科学   132138篇
妇产科学   111632篇
基础医学   643938篇
口腔科学   118433篇
临床医学   382387篇
内科学   758674篇
皮肤病学   103056篇
神经病学   360548篇
特种医学   170059篇
外国民族医学   912篇
外科学   647382篇
综合类   125731篇
现状与发展   23篇
一般理论   2577篇
预防医学   354624篇
眼科学   99924篇
药学   299926篇
  19篇
中国医学   10959篇
肿瘤学   201373篇
  2021年   49837篇
  2020年   35451篇
  2019年   58548篇
  2018年   73114篇
  2017年   55492篇
  2016年   61820篇
  2015年   75089篇
  2014年   109852篇
  2013年   175167篇
  2012年   117153篇
  2011年   120152篇
  2010年   122711篇
  2009年   125922篇
  2008年   107388篇
  2007年   113876篇
  2006年   123421篇
  2005年   118575篇
  2004年   119494篇
  2003年   109860篇
  2002年   100342篇
  2001年   153587篇
  2000年   149329篇
  1999年   137101篇
  1998年   65433篇
  1997年   61897篇
  1996年   59705篇
  1995年   60904篇
  1994年   55100篇
  1993年   51122篇
  1992年   103130篇
  1991年   98840篇
  1990年   93868篇
  1989年   91473篇
  1988年   85031篇
  1987年   83572篇
  1986年   79262篇
  1985年   77726篇
  1984年   65618篇
  1983年   58419篇
  1982年   47673篇
  1981年   44418篇
  1980年   41694篇
  1979年   57463篇
  1978年   46690篇
  1977年   41149篇
  1976年   38273篇
  1975年   37524篇
  1974年   42178篇
  1973年   40352篇
  1972年   37919篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
84.

Objective

The aim was to identify healthcare payment and financing reforms to promote health equity and ways that the Agency for Healthcare Research and Quality (AHRQ) may promote those reforms.

Data Sources and Study Setting

AHRQ convened a payment and financing workgroup–the authors of this paper–as part of its Health Equity Summit held in July 2022. This workgroup drew from its collective experience with healthcare payment and financing reform, as well as feedback from participants in a session at the Health Equity Summit, to identify the evidence base and promising paths for reforms to promote health equity.

Study Design

The payment and financing workgroup developed an outline of reforms to promote health equity, presented the outline to participants in the payment and financing session of the July 2022 AHRQ Health Equity Summit, and integrated feedback from the participants.

Data Collection/Extraction Methods

This paper did not require novel data collection; the authors collected the data from the existing evidence base.

Principal Findings

The paper outlines root causes of health inequity and corresponding potential reforms in five domains: (1) the differential distribution of resources between healthcare providers serving different communities, (2) scarcity of financing for populations most in need, (3) lack of integration/accountability, (4) patient cost barriers to care, and (5) bias in provider behavior and diagnostic tools.

Conclusions

Additional research is necessary to determine whether the proposed reforms are effective in promoting health equity.  相似文献   
85.
86.
87.
88.
This paper examines the propagation of COVID-19 across the Spanish provinces and assesses the effectiveness of the Spanish lockdown of the population implemented on March 14, 2020 in order to battle this pandemic. To achieve these objectives, a standard spatial econometric model used in economics is adapted to resemble the popular reproduction models employed in the epidemiological literature. In addition, we introduce a counterfactual exercise that allows us to examine the Gross domestic product (GDP) gains of bringing forward the date of the Spanish Lockdown. We find that the number of COVID-19 cases would have been reduced by 70.4% in the absence of spatial propagation between the Spanish provinces. We also determine that the lockdown prevented the propagation of the virus within and between provinces. As such, the Spanish lockdown reduced the number of potential COVID-19 cases by 82.8%. However, the number of coronavirus cases would have been reduced by an additional 11.6% if the lockdown had been brought forward to March 7, 2020. Finally, an earlier lockdown would have saved approximately 26,900,000,000 euros.  相似文献   
89.
90.
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