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   4296686篇
  免费   362783篇
  国内免费   15307篇
耳鼻咽喉   61204篇
儿科学   133730篇
妇产科学   112537篇
基础医学   658546篇
口腔科学   119454篇
临床医学   391459篇
内科学   779876篇
皮肤病学   103590篇
神经病学   368463篇
特种医学   171670篇
外国民族医学   913篇
外科学   655468篇
综合类   126626篇
现状与发展   23篇
一般理论   2611篇
预防医学   365555篇
眼科学   101094篇
药学   304073篇
  25篇
中国医学   11405篇
肿瘤学   206454篇
  2021年   55949篇
  2020年   35639篇
  2019年   58814篇
  2018年   73567篇
  2017年   56194篇
  2016年   62481篇
  2015年   75731篇
  2014年   110535篇
  2013年   175950篇
  2012年   119405篇
  2011年   122591篇
  2010年   123441篇
  2009年   126420篇
  2008年   109420篇
  2007年   116104篇
  2006年   125486篇
  2005年   120623篇
  2004年   121404篇
  2003年   112036篇
  2002年   102688篇
  2001年   154965篇
  2000年   151147篇
  1999年   140111篇
  1998年   71482篇
  1997年   67903篇
  1996年   65775篇
  1995年   61642篇
  1994年   55701篇
  1993年   51727篇
  1992年   104068篇
  1991年   99441篇
  1990年   94539篇
  1989年   92145篇
  1988年   85718篇
  1987年   84208篇
  1986年   79847篇
  1985年   78317篇
  1984年   66248篇
  1983年   59083篇
  1982年   48274篇
  1981年   44998篇
  1980年   42294篇
  1979年   58124篇
  1978年   47251篇
  1977年   41774篇
  1976年   38825篇
  1975年   38029篇
  1974年   42640篇
  1973年   40774篇
  1972年   38225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