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   3840篇
  免费   149篇
  国内免费   5篇
耳鼻咽喉   4篇
儿科学   156篇
妇产科学   105篇
基础医学   200篇
口腔科学   31篇
临床医学   342篇
内科学   705篇
皮肤病学   29篇
神经病学   220篇
特种医学   114篇
外科学   241篇
综合类   27篇
预防医学   1272篇
眼科学   56篇
药学   237篇
中国医学   1篇
肿瘤学   254篇
  2024年   3篇
  2023年   245篇
  2022年   223篇
  2021年   276篇
  2020年   496篇
  2019年   216篇
  2018年   205篇
  2017年   253篇
  2016年   205篇
  2015年   247篇
  2014年   312篇
  2013年   214篇
  2012年   119篇
  2011年   74篇
  2010年   178篇
  2009年   169篇
  2008年   50篇
  2007年   67篇
  2006年   61篇
  2005年   44篇
  2004年   27篇
  2003年   34篇
  2002年   48篇
  2001年   39篇
  2000年   25篇
  1999年   35篇
  1998年   27篇
  1997年   13篇
  1996年   14篇
  1995年   18篇
  1994年   15篇
  1993年   4篇
  1992年   4篇
  1991年   6篇
  1990年   4篇
  1989年   8篇
  1988年   2篇
  1985年   3篇
  1984年   4篇
  1983年   1篇
  1981年   1篇
  1980年   1篇
  1978年   2篇
  1973年   1篇
  1968年   1篇
排序方式: 共有3994条查询结果,搜索用时 62 毫秒
21.
22.
23.
24.
25.
26.
《Vaccine》2016,34(41):5034-5039
BackgroundAs the World Health Organization (WHO) currently recommends that children be protected against 11 different pathogens, it is becoming increasingly necessary to administer multiple injectable vaccines during a single immunization visit. In this study we assess Gambian healthcare providers’ and infant caregivers’ attitudes and practices related to the administration of multiple injectable vaccines to a child at a single immunization visit before and after the 2015 introduction of inactivated polio vaccine (IPV). IPV introduction increased the number of injectable vaccines recommended for the 4-month immunization visit from two to three in The Gambia.MethodsWe conducted a cross-sectional questionnaire-based survey before and after the introduction of IPV at 4 months of age in a representative sample of all health facilities providing immunizations in The Gambia. Healthcare providers who administer vaccines at the selected health facilities and caregivers who brought infants for their 4 month immunization visit were surveyed.FindingsPrior to IPV introduction, 9.9% of healthcare providers and 35.7% of infant caregivers expressed concern about a child receiving more than 2 injections in a single visit. Nevertheless, 98.8% and 90.9% of infants received all required vaccinations for the visit before and after IPV introduction, respectively. The only reason why vaccines were not received was vaccine stock-outs. Infant caregivers generally agreed that vaccinators could be trusted to provide accurate information regarding the number of vaccines that a child needed.ConclusionHealthcare providers and infant caregivers in this resource limited setting accepted an increase in the number of injectable vaccines administered at a single visit even though some expressed concerns about the increase.  相似文献   
27.
28.
29.
ObjectiveWe examine remission rate probabilities, recovery rates, and residual symptoms across 36 weeks in the Treatment for Adolescents with Depression Study (TADS).MethodThe TADS, a multisite clinical trial, randomized 439 adolescents with major depressive disorder to 12 weeks of treatment with fluoxetine, cognitive–behavioral therapy, their combination, or pill placebo. The pill placebo group, treated openly after week 12, was not included in the subsequent analyses. Treatment differences in remission rates and probabilities of remission over time are compared. Recovery rates in remitters at weeks 12 (acute phase remitters) and 18 (continuation phase remitters) are summarized. We also examined whether residual symptoms at the end of 12 weeks of acute treatment predicted later remission.ResultsAt week 36, the estimated remission rates for intention-to-treat cases were as follows: combination, 60%; fluoxetine, 55%; cognitive–behavioral therapy, 64%; and overall, 60%. Paired comparisons reveal that, at week 24, all active treatments converge on remission outcomes. The recovery rate at week 36 was 65% for acute phase remitters and 71% for continuation phase remitters, with no significant between-treatment differences in recovery rates. Residual symptoms at the end of acute treatment predicted failure to achieve remission at weeks 18 and 36.ConclusionsMost depressed adolescents in all three treatment modalities achieved remission at the end of 9 months of treatment.  相似文献   
30.
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