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   3866899篇
  免费   318349篇
  国内免费   14569篇
耳鼻咽喉   54351篇
儿科学   124539篇
妇产科学   101880篇
基础医学   602868篇
口腔科学   106109篇
临床医学   346345篇
内科学   692685篇
皮肤病学   99751篇
神经病学   321641篇
特种医学   152535篇
外国民族医学   452篇
外科学   601244篇
综合类   113208篇
现状与发展   23篇
一般理论   2299篇
预防医学   319416篇
眼科学   90131篇
药学   270789篇
  23篇
中国医学   11486篇
肿瘤学   188042篇
  2021年   55672篇
  2020年   35571篇
  2019年   58642篇
  2018年   72819篇
  2017年   55198篇
  2016年   60923篇
  2015年   74879篇
  2014年   109317篇
  2013年   174738篇
  2012年   102503篇
  2011年   104761篇
  2010年   120535篇
  2009年   123661篇
  2008年   92318篇
  2007年   97455篇
  2006年   107515篇
  2005年   102740篇
  2004年   104403篇
  2003年   95326篇
  2002年   85481篇
  2001年   130333篇
  2000年   123864篇
  1999年   118523篇
  1998年   68168篇
  1997年   64927篇
  1996年   62913篇
  1995年   58238篇
  1994年   52557篇
  1993年   48748篇
  1992年   85525篇
  1991年   82695篇
  1990年   79745篇
  1989年   78766篇
  1988年   73461篇
  1987年   71307篇
  1986年   68008篇
  1985年   67275篇
  1984年   58110篇
  1983年   52524篇
  1982年   44866篇
  1981年   41958篇
  1980年   39569篇
  1979年   49841篇
  1978年   41608篇
  1977年   37659篇
  1976年   34861篇
  1975年   35025篇
  1974年   37336篇
  1973年   35825篇
  1972年   33673篇
排序方式: 共有10000条查询结果,搜索用时 46 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