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   3483899篇
  免费   295289篇
  国内免费   13982篇
耳鼻咽喉   48877篇
儿科学   112099篇
妇产科学   91860篇
基础医学   551620篇
口腔科学   94499篇
临床医学   310042篇
内科学   617626篇
皮肤病学   91949篇
神经病学   296592篇
特种医学   138323篇
外国民族医学   393篇
外科学   546172篇
综合类   103261篇
现状与发展   24篇
一般理论   2254篇
预防医学   289127篇
眼科学   80368篇
药学   242734篇
  18篇
中国医学   9894篇
肿瘤学   165438篇
  2021年   55313篇
  2020年   35309篇
  2019年   58414篇
  2018年   71886篇
  2017年   54384篇
  2016年   60100篇
  2015年   74272篇
  2014年   108702篇
  2013年   174298篇
  2012年   94848篇
  2011年   95566篇
  2010年   117946篇
  2009年   122067篇
  2008年   83448篇
  2007年   87747篇
  2006年   98122篇
  2005年   94154篇
  2004年   95903篇
  2003年   86948篇
  2002年   77332篇
  2001年   104643篇
  2000年   97323篇
  1999年   97582篇
  1998年   65513篇
  1997年   63177篇
  1996年   61084篇
  1995年   56475篇
  1994年   50779篇
  1993年   47245篇
  1992年   69712篇
  1991年   66938篇
  1990年   64306篇
  1989年   63439篇
  1988年   59422篇
  1987年   57879篇
  1986年   55222篇
  1985年   55181篇
  1984年   49797篇
  1983年   45835篇
  1982年   42303篇
  1981年   39754篇
  1980年   36990篇
  1979年   41526篇
  1978年   36193篇
  1977年   33052篇
  1976年   30454篇
  1975年   29769篇
  1974年   31077篇
  1973年   29914篇
  1972年   28272篇
排序方式: 共有10000条查询结果,搜索用时 437 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