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   3775744篇
  免费   312760篇
  国内免费   14707篇
耳鼻咽喉   50995篇
儿科学   119567篇
妇产科学   97794篇
基础医学   592440篇
口腔科学   102583篇
临床医学   340224篇
内科学   675316篇
皮肤病学   98861篇
神经病学   317584篇
特种医学   147510篇
外国民族医学   263篇
外科学   583511篇
综合类   113890篇
现状与发展   23篇
一般理论   2356篇
预防医学   308524篇
眼科学   89025篇
药学   261953篇
  23篇
中国医学   11465篇
肿瘤学   189304篇
  2021年   55950篇
  2020年   35618篇
  2019年   58749篇
  2018年   73049篇
  2017年   55416篇
  2016年   61369篇
  2015年   75064篇
  2014年   109472篇
  2013年   174987篇
  2012年   105285篇
  2011年   107238篇
  2010年   121245篇
  2009年   124165篇
  2008年   93677篇
  2007年   98427篇
  2006年   107808篇
  2005年   102600篇
  2004年   104238篇
  2003年   94105篇
  2002年   83427篇
  2001年   136598篇
  2000年   130055篇
  1999年   122434篇
  1998年   68770篇
  1997年   65384篇
  1996年   63142篇
  1995年   58646篇
  1994年   52615篇
  1993年   49010篇
  1992年   85369篇
  1991年   81236篇
  1990年   76940篇
  1989年   75365篇
  1988年   69275篇
  1987年   67440篇
  1986年   63760篇
  1985年   62991篇
  1984年   55034篇
  1983年   49695篇
  1982年   43705篇
  1981年   41050篇
  1980年   38506篇
  1979年   44984篇
  1978年   38320篇
  1977年   35011篇
  1976年   32039篇
  1975年   30867篇
  1974年   32564篇
  1973年   31284篇
  1972年   29150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