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   2372860篇
  免费   154988篇
  国内免费   3113篇
耳鼻咽喉   32252篇
儿科学   75970篇
妇产科学   62690篇
基础医学   348543篇
口腔科学   63777篇
临床医学   211896篇
内科学   458672篇
皮肤病学   51853篇
神经病学   186062篇
特种医学   88135篇
外国民族医学   489篇
外科学   354834篇
综合类   47524篇
现状与发展   12篇
一般理论   848篇
预防医学   183136篇
眼科学   54471篇
药学   175497篇
  58篇
中国医学   4592篇
肿瘤学   129650篇
  2021年   19409篇
  2019年   20287篇
  2018年   27155篇
  2017年   20429篇
  2016年   22900篇
  2015年   25741篇
  2014年   36190篇
  2013年   54041篇
  2012年   74721篇
  2011年   79423篇
  2010年   47075篇
  2009年   44587篇
  2008年   74636篇
  2007年   79503篇
  2006年   80328篇
  2005年   77796篇
  2004年   74385篇
  2003年   71707篇
  2002年   69373篇
  2001年   108750篇
  2000年   111459篇
  1999年   93508篇
  1998年   26993篇
  1997年   23659篇
  1996年   24058篇
  1995年   22718篇
  1994年   20898篇
  1993年   19714篇
  1992年   72005篇
  1991年   70078篇
  1990年   68400篇
  1989年   65671篇
  1988年   60307篇
  1987年   59134篇
  1986年   55226篇
  1985年   53011篇
  1984年   39312篇
  1983年   33397篇
  1982年   19858篇
  1979年   35870篇
  1978年   25652篇
  1977年   21230篇
  1976年   20332篇
  1975年   21816篇
  1974年   26148篇
  1973年   24803篇
  1972年   23200篇
  1971年   22039篇
  1970年   20250篇
  1969年   19317篇
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
91.
92.
93.
94.
95.
96.
97.
Maternal Zika virus infection (ZIKV) has serious health consequences for unborn offspring. Knowledge about prevention is critical to reducing risk, yet what women in the high-risk US–Mexico border region know about protecting themselves and their babies from ZIKV is mostly unknown. This study aimed to assess knowledge of ZIKV among pregnant and inter-conception women and to identify sources of information that might address knowledge gaps. Clients in five federally-funded, border region Healthy Start programs (N?=?326) were interviewed in late 2016 about their knowledge of ZIKV prevention methods and whether they believed themselves or their babies to be at risk. Sources of information about ZIKV and demographic characteristics were also measured. Chi square tests identified important associations between variables; adjusted odds ratios (AOR) and 95% confidence intervals for knowledge and beliefs were calculated. Among the 305 women aware of ZIKV, 69.5% could name two ways to prevent infection. Only 16.1% of women named using condoms or abstaining from sex as a prevention method. While 75.3% heard about ZIKV first from TV/radio, just 9.5% found the information helpful. Women who received helpful information from health care providers had greater odds of knowing two prevention methods (AOR?=?2.0; 1.1–3.7), when to test for ZIKV (AOR?=?5.2; 2.1–13.2), and how long to delay pregnancy after infection in a male partner (AOR?=?1.9; 1.1–3.2). Those who said web-based and social media sources were helpful had greater odds of knowing when to test for ZIKV (AOR?=?2.8; 1.3–6.3). Results can inform messaging for safe pregnancy and ZIKV prevention.  相似文献   
98.
99.
While colorectal cancer (CRC) screening rates have been increasing in the general population, rates are considerably lower in Federally Qualified Health Centers (FQHCs), which serve a large proportion of uninsured and medically vulnerable patients. Efforts to screen eligible patients must be accelerated if we are to reach the national screening goal of 80% by 2018 and beyond. To inform this work, we conducted a survey of key informants at FQHCs in eight states to determine which evidence-based interventions (EBIs) to promote CRC screening are currently being used, and which implementation strategies are being employed to ensure that the interventions are executed as intended. One hundred and forty-eight FQHCs were invited to participate in the study, and 56 completed surveys were received for a response rate of 38%. Results demonstrated that provider reminder and recall systems were the most commonly used EBIs (44.6%) while the most commonly used implementation strategy was the identification of barriers (84.0%). The mean number of EBIs that were fully implemented at the centers was 2.4 (range 0–7) out of seven. Almost one-quarter of respondents indicated that their FQHCs were not using any EBIs to increase CRC screening. Full implementation of EBIs was correlated with higher CRC screening rates. These findings identify gaps as well as the preferences and needs of FQHCs in selecting and implementing EBIs for CRC screening.  相似文献   
100.
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