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   1390篇
  免费   85篇
  国内免费   20篇
耳鼻咽喉   5篇
儿科学   78篇
妇产科学   14篇
基础医学   104篇
口腔科学   25篇
临床医学   173篇
内科学   186篇
皮肤病学   42篇
神经病学   88篇
特种医学   193篇
外科学   205篇
综合类   58篇
预防医学   207篇
眼科学   11篇
药学   74篇
中国医学   6篇
肿瘤学   26篇
  2021年   11篇
  2020年   6篇
  2019年   13篇
  2018年   13篇
  2017年   11篇
  2016年   21篇
  2015年   19篇
  2014年   42篇
  2013年   37篇
  2012年   46篇
  2011年   56篇
  2010年   51篇
  2009年   31篇
  2008年   36篇
  2007年   46篇
  2006年   43篇
  2005年   43篇
  2004年   43篇
  2003年   42篇
  2002年   41篇
  2001年   36篇
  2000年   58篇
  1999年   62篇
  1998年   52篇
  1997年   47篇
  1996年   41篇
  1995年   28篇
  1994年   30篇
  1993年   27篇
  1992年   25篇
  1991年   60篇
  1990年   35篇
  1989年   44篇
  1988年   29篇
  1987年   29篇
  1986年   26篇
  1985年   19篇
  1984年   27篇
  1983年   24篇
  1981年   11篇
  1980年   12篇
  1979年   7篇
  1978年   6篇
  1977年   7篇
  1976年   7篇
  1975年   11篇
  1974年   7篇
  1973年   6篇
  1972年   7篇
  1970年   7篇
排序方式: 共有1495条查询结果,搜索用时 475 毫秒
1.
2.
ObjectivesTo fill an empirical gap in the literature by examining changes in quality of care measures occurring when multispecialty clinic systems were acquired by hospital-owned, vertically integrated health care delivery systems in the Twin Cities area.ConclusionsMoving a clinic system into a vertically integrated delivery system resulted in limited increases in quality of care indicators. Caution is warranted when the acquisition causes disruption in referral patterns.  相似文献   
3.
4.
Sonoelasticity imaging of prostate cancer: in vitro results   总被引:2,自引:0,他引:2  
  相似文献   
5.
6.
7.
Objective. To provide national estimates of the effect of out-of-pocket premiums and benefits on Medicare beneficiaries' choice among managed care health plans.
Data Sources/Study Setting. The data represent the population of all Medicare+Choice (M+C) plans offered to Medicare beneficiaries in the United States in 1999.
Study Design. The dependent variable is the log of the ratio of the market share of the j th health plan to the lowest cost plan in the beneficiary's county of residence. The explanatory variables are measures of premiums and benefits in the j th health plan relative to the premiums and benefits in the lowest cost plan.
Data Collection Methods. The data are from the 1999 Medicare Compare database, and M+C enrollment data from the Centers for Medicare and Medicaid Services (CMS).
Principal Findings. A $10 increase in an M+C plan's out-of-pocket premium, relative to its competitors, is associated with a decrease of four percentage points in the j th plan's market share (i.e., from 25 to 21 percent), holding the premiums of competing plans constant.
Conclusions. Although our price elasticity estimates are low, the market share losses associated with small changes in a health plan's premium, relative to its competitors, may be sufficient to discipline premiums in a competitive market. Bidding behavior by plans in the Medicare Competitive Pricing Demonstration supports this conclusion.  相似文献   
8.
A program that allows a microcomputer to function as a semi-automatic multi-keyed laboratory cell counter is presented. Using a microcomputer as a cell counter allows laboratory personnel to work faster, more efficiently and more accurately than the traditional multi-keyed laboratory counter. Automatic data storage, automatic calculation of results and error trapping are also available. The program is presented in the Pascal programming language.  相似文献   
9.
This article provides an overview of health data available in the former USSR. It is not all-inclusive in terms of chronic diseases covered or in details of data collection activities carried out. However, several broad conclusions can be drawn: There is a system of population and mortality data collection which covers the former USSR and which can be disaggregated to smaller administrative areas. The system is being exploited by population specialists, demographers, medical demographers and epidemiologists, both nationally and internationally, both for analytical purposes and as part of health monitoring systems. A national-level data-collection system for morbidity and disability, based on delivery of health services, is in place and is exploited by both health researchers and health planners. The shortcomings of such a health service-based statistical system are well recognized. Further standardization or calibration of measures of total and cause-specific morbidity and disability measures should be examined. A potential calibration tool is the 1988-1993 health examination and interview survey covering a representative (but highly clustered) sample of the former USSR population. The possibilities of greater standardization of measurement procedures used in this survey should also be investigated. In certain disease areas, e.g. cardiovascular diseases, cancer, rheumatic diseases and gerontology, clinical and epidemiological studies involving international collaboration have been carried out. This has resulted in the use of internationally accepted disease definitions, diagnostic procedures, and of clinical and laboratory standardization of demographic, social and biological measurements. Participation in multilateral or bilateral studies should be encouraged in research in disease areas where these types of programmes have not yet been instituted.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   
10.
This paper advocates strengthening the role of primary health care in health promotion by bridging cultures in Aboriginal health. It encourages health care providers to consider the need for cross-cultural awareness in order to provide more effective health promotion. It suggests a number of strategies for overcoming structural barriers and individual factors which may hinder positive personal and professional cross-cultural communications.  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