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   3326211篇
  免费   279896篇
  国内免费   13478篇
耳鼻咽喉   45164篇
儿科学   103693篇
妇产科学   85096篇
基础医学   532641篇
口腔科学   89531篇
临床医学   302760篇
内科学   579632篇
皮肤病学   90926篇
神经病学   283297篇
特种医学   131594篇
外国民族医学   258篇
外科学   514670篇
综合类   100528篇
现状与发展   23篇
一般理论   2250篇
预防医学   275324篇
眼科学   76146篇
药学   234135篇
  25篇
中国医学   10035篇
肿瘤学   161857篇
  2021年   55235篇
  2020年   35233篇
  2019年   58180篇
  2018年   71232篇
  2017年   53955篇
  2016年   59731篇
  2015年   73910篇
  2014年   108224篇
  2013年   173624篇
  2012年   90730篇
  2011年   90315篇
  2010年   116559篇
  2009年   121026篇
  2008年   76921篇
  2007年   79853篇
  2006年   90759篇
  2005年   85678篇
  2004年   87458篇
  2003年   78419篇
  2002年   68040篇
  2001年   107195篇
  2000年   100004篇
  1999年   98937篇
  1998年   65166篇
  1997年   62943篇
  1996年   60708篇
  1995年   56239篇
  1994年   50117篇
  1993年   46891篇
  1992年   68091篇
  1991年   64405篇
  1990年   61473篇
  1989年   60572篇
  1988年   55566篇
  1987年   54052篇
  1986年   51247篇
  1985年   50975篇
  1984年   46716篇
  1983年   42735篇
  1982年   40837篇
  1981年   38442篇
  1980年   36369篇
  1979年   37701篇
  1978年   33396篇
  1977年   31379篇
  1976年   28174篇
  1975年   27070篇
  1974年   27240篇
  1973年   26202篇
  1972年   24594篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
Background: The opioid addiction and overdose crisis continues to ravage communities across the U.S. Maintenance pharmacotherapy using buprenorphine or methadone is the most effective intervention for Opioid Use Disorder (OUD), yet few have immediate and sustained access to these medications. Objectives: To address lack of medication access for people with OUD, the Missouri Department of Mental Health began implementing a Medication First (Med First) treatment approach in its publicly-funded system of comprehensive substance use disorder treatment programs. Methods: This Perspective describes the four principles of Med First, which are based on evidence-based guidelines. It draws conceptual comparisons between the Housing First approach to chronic homelessness and the Med First approach to pharmacotherapy for OUD, and compares state certification standards for substance use disorder (SUD) treatment (the traditional approach) to Med First guidelines for OUD treatment. Finally, the Perspective details how Med First principles have been practically implemented. Results: Med First principles emphasize timely access to maintenance pharmacotherapy without requiring psychosocial services or discontinuation for any reason other than harm to the client. Early results regarding medication utilization and treatment retention are promising. Feedback from providers has been largely favorable, though clinical- and system-level obstacles to effective OUD treatment remain. Conclusion: Like the Housing First model, Medication First is designed to decrease human suffering and activate the strengths and capacities of people in need. It draws on decades of research and facilitates partnerships between psychosocial and medical treatment providers to offer effective and life-saving care to persons with OUD.  相似文献   
992.
Purpose: Non-ambulatory persons with cerebral palsy are prone to low bone mineral density. In ambulatory persons with cerebral palsy, bone mineral density deficits are expected to be small or absent, but a consensus conclusion is lacking. In this systematic review bone mineral density in ambulatory persons with cerebral palsy (Gross Motor Function Classification Scales I–III) was studied.

Materials and methods: Medline, Embase, and Web of Science were searched. According to international guidelines, low bone mineral density was defined as Z-score?≤??2.0. In addition, we focused on Z-score?≤??1.0 because this may indicate a tendency towards low bone mineral density.

Results: We included 16 studies, comprising 465 patients aged 1–65?years. Moderate and conflicting evidence for low bone mineral density (Z-score?≤??2.0) was found for several body parts (total proximal femur, total body, distal femur, lumbar spine) in children with Gross Motor Function Classification Scales II and III. We found no evidence for low bone mineral density in children with Gross Motor Function Classification Scale I or adults, although there was a tendency towards low bone mineral density (Z-score?≤??1.0) for several body parts.

Conclusions: Although more high-quality research is needed, results indicate that deficits in bone mineral density are not restricted to non-ambulatory people with cerebral palsy.

  • Implications for Rehabilitation
  • Although more high-quality research is needed, including adults and fracture risk assessment, the current study indicates that deficits in bone mineral density are not restricted to non-ambulatory people with CP.

  • Health care professionals should be aware that optimal nutrition, supplements on indication, and an active lifestyle, preferably with weight-bearing activities, are important in ambulatory people with CP, also from a bone quality point-of-view.

  • If indicated, medication and fall prevention training should be prescribed.

  相似文献   
993.
994.
995.
996.
997.
998.
999.
1000.
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