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   4277736篇
  免费   361307篇
  国内免费   15261篇
耳鼻咽喉   61027篇
儿科学   133252篇
妇产科学   111907篇
基础医学   656018篇
口腔科学   118931篇
临床医学   388515篇
内科学   777000篇
皮肤病学   103331篇
神经病学   367214篇
特种医学   170967篇
外国民族医学   912篇
外科学   653240篇
综合类   126287篇
现状与发展   23篇
一般理论   2592篇
预防医学   363273篇
眼科学   100825篇
药学   302343篇
  24篇
中国医学   11385篇
肿瘤学   205238篇
  2021年   55658篇
  2020年   35489篇
  2019年   58604篇
  2018年   73211篇
  2017年   55905篇
  2016年   62218篇
  2015年   75522篇
  2014年   110268篇
  2013年   175609篇
  2012年   118076篇
  2011年   121307篇
  2010年   123018篇
  2009年   126154篇
  2008年   108494篇
  2007年   115185篇
  2006年   124710篇
  2005年   119857篇
  2004年   120756篇
  2003年   111497篇
  2002年   102179篇
  2001年   154325篇
  2000年   150473篇
  1999年   139562篇
  1998年   71303篇
  1997年   67780篇
  1996年   65648篇
  1995年   61508篇
  1994年   55584篇
  1993年   51618篇
  1992年   103575篇
  1991年   98958篇
  1990年   94066篇
  1989年   91708篇
  1988年   85315篇
  1987年   83793篇
  1986年   79481篇
  1985年   77916篇
  1984年   65965篇
  1983年   58864篇
  1982年   48151篇
  1981年   44894篇
  1980年   42200篇
  1979年   57848篇
  1978年   47056篇
  1977年   41609篇
  1976年   38671篇
  1975年   37864篇
  1974年   42446篇
  1973年   40578篇
  1972年   38041篇
排序方式: 共有10000条查询结果,搜索用时 15 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