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   3372187篇
  免费   292063篇
  国内免费   13095篇
耳鼻咽喉   46806篇
儿科学   108416篇
妇产科学   89501篇
基础医学   537053篇
口腔科学   92655篇
临床医学   308440篇
内科学   590910篇
皮肤病学   91112篇
神经病学   288240篇
特种医学   133533篇
外国民族医学   288篇
外科学   520337篇
综合类   101932篇
现状与发展   24篇
一般理论   2359篇
预防医学   287240篇
眼科学   77598篇
药学   233251篇
  21篇
中国医学   8947篇
肿瘤学   158682篇
  2021年   49222篇
  2020年   35001篇
  2019年   57949篇
  2018年   71229篇
  2017年   53947篇
  2016年   59355篇
  2015年   73479篇
  2014年   107637篇
  2013年   172769篇
  2012年   93770篇
  2011年   94329篇
  2010年   116800篇
  2009年   121143篇
  2008年   81493篇
  2007年   84973篇
  2006年   94840篇
  2005年   90575篇
  2004年   92093篇
  2003年   82453篇
  2002年   72153篇
  2001年   101906篇
  2000年   94185篇
  1999年   92892篇
  1998年   58718篇
  1997年   56744篇
  1996年   54820篇
  1995年   55599篇
  1994年   49972篇
  1993年   46638篇
  1992年   67183篇
  1991年   64737篇
  1990年   61297篇
  1989年   60427篇
  1988年   56205篇
  1987年   55033篇
  1986年   52447篇
  1985年   52054篇
  1984年   47835篇
  1983年   43895篇
  1982年   41248篇
  1981年   38970篇
  1980年   36688篇
  1979年   40301篇
  1978年   35917篇
  1977年   32399篇
  1976年   29747篇
  1975年   28693篇
  1974年   30259篇
  1973年   29410篇
  1972年   27766篇
排序方式: 共有10000条查询结果,搜索用时 125 毫秒
81.
82.

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   
83.
84.
85.
86.
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   
87.
88.
89.
Brandt  L.  Albert  S.  Brandt  K. L. 《Der Anaesthesist》2022,71(11):858-864
Die Anaesthesiologie - Als Meralgia paraesthetica (MP) bezeichnet man eine zu den neurologischen Engpasssyndromen zählende Schädigung des aus dem Plexus lumbalis entspringenden sensiblen...  相似文献   
90.
Delirium is one of the most commonly occurring postoperative complications in older adults. It occurs due to the vulnerability of cerebral functioning to pathophysiological stressors. Identification of those at increased risk of developing delirium early in the surgical pathway provides an opportunity for modification of predisposing and precipitating risk factors and effective shared decision-making. No single delirium prediction tool is used widely in surgical settings. Multi-component interventions to prevent delirium involve structured risk factor modification supported by geriatrician input; these are clinically efficacious and cost effective. Barriers to the widespread implementation of such complex interventions exist, resulting in an ‘implementation gap’. There is a lack of evidence for pharmacological prophylaxis for the prevention of delirium. Current evidence suggests that avoidance of peri-operative benzodiazepines, careful titration of anaesthetic depth guided by processed electroencephalogram monitoring and treatment of pain are the most effective strategies to minimise the risk of delirium. Addressing postoperative delirium requires a collaborative, whole pathway approach, beginning with the early identification of those patients who are at risk. The research agenda should continue to examine the potential for pharmacological prophylaxis to prevent delirium while also addressing how successful models of delirium prevention can be translated from one setting to another, underpinned by implementation science methodology.  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