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   620452篇
  免费   46235篇
  国内免费   14486篇
耳鼻咽喉   7515篇
儿科学   14674篇
妇产科学   10420篇
基础医学   46737篇
口腔科学   15901篇
临床医学   66380篇
内科学   74736篇
皮肤病学   8607篇
神经病学   33044篇
特种医学   16325篇
外国民族医学   76篇
外科学   63681篇
综合类   95257篇
现状与发展   42篇
一般理论   54篇
预防医学   63500篇
眼科学   8767篇
药学   56711篇
  713篇
中国医学   60216篇
肿瘤学   37817篇
  2024年   2051篇
  2023年   10746篇
  2022年   19547篇
  2021年   26230篇
  2020年   25199篇
  2019年   28666篇
  2018年   26123篇
  2017年   23426篇
  2016年   21347篇
  2015年   20258篇
  2014年   40203篇
  2013年   43729篇
  2012年   35697篇
  2011年   38461篇
  2010年   31104篇
  2009年   27977篇
  2008年   26880篇
  2007年   27637篇
  2006年   24107篇
  2005年   21000篇
  2004年   17121篇
  2003年   15074篇
  2002年   12006篇
  2001年   10529篇
  2000年   8885篇
  1999年   7325篇
  1998年   6069篇
  1997年   5564篇
  1996年   4714篇
  1995年   4451篇
  1994年   4065篇
  1993年   3327篇
  1992年   3237篇
  1991年   2839篇
  1990年   2504篇
  1989年   2262篇
  1988年   2127篇
  1987年   1857篇
  1986年   1697篇
  1985年   4949篇
  1984年   5955篇
  1983年   4203篇
  1982年   4912篇
  1981年   4277篇
  1980年   3778篇
  1979年   3462篇
  1978年   2946篇
  1977年   2224篇
  1976年   2530篇
  1975年   1866篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
This meta-analysis was designed to assess the effectiveness and safety of extracorporeal shock wave therapy (ESWT) for patients with low back pain (LBP). Pubmed, Embase, Cochrane's library, PEDro (Physiotherapy Evidence Database), China National Knowledge Infrastructure (CNKI), and Wanfang Data were searched until December 2019 to identify studies assessing the effectiveness and safety of EPSW for LBP. The prime outcome is pain intensity measured by Visual Analog Scale (VAS) or numeric rating scale (NRS). Other outcomes included functional status, quality of life, psychological outcomes measured by Oswestry Disability Index (ODI), as well as the adverse events. Mean differences (MD) were calculated for continuous outcomes, while odd ratios (OR) were calculated for binary outcomes. Revman 5.3 software was used for statistical analysis. Five randomized controlled trials (RCTs) were finally included in this meta-analysis. The pooled mean difference in post-treatment pain scores was −2.37 (P <0.0001), indicating that post-treatment pain scores was significantly higher by 2.37 in control group than in ESWT group. At a mean follow-up time of 4–6 weeks, the pooled mean difference in ODI scores was −14.10 (P <0.00001), indicating that the pooled mean difference of post-treatment ODI scores was 14.10 higher in control group than in ESWT group. The use of ESWT is effective in alleviating pain and improving the general functional state for patients with LBP. However, more evidence was needed to verify its safety.  相似文献   
6.
7.
Whose values matter when considering which environment is healthier for a child whose guardianship is contested? The biological mother from a remote Australian Aboriginal community, who voluntarily relinquished her but has now requested her return? The foster mother who has cared for her in a metropolitan centre in another State of Australia, thousands of kilometres away? The welfare professionals who also live in that city? Or the child herself, who left her birth home and community five years earlier at the age of two? Drawing on a case study of a seven-year old Aboriginal girl, the authors argue that non-Indigenous values trumped Indigenous values without the realisation of key players who were empowered to make such determinations. The article uses Manuel DeLanda's neo-assemblage theory to consider the range of processes that exert themselves to shape place-values and social identity in colonised nations. It will also draw on Erik Erikson's and Lev Vygotsky's theories of psychosocial development to consider competing sets of values that raised feelings of dissonance within the child. Beliefs about what makes a place health-giving are revealed to be complex in colonised nations. Despite policy and legislative changes to better support Aboriginal people and their right to difference, non-Indigenous professionals can continue to be driven by an unrecognised systemic racism. While place-values are not, of course, the only (or perhaps even the most significant) consideration in guardianship determinations, this article will argue they can play a significant and covert role.  相似文献   
8.
9.
目的:通过中英文文献了解结直肠癌患者生命质量研究现状及发展趋势。方法:运用CiteSpace对中国知网(CNKI)、万方数据知识服务平台、中国生物医学文献数据库、Web of Science核心数据集、PubMed、Cochrane Library中收录的关于结直肠癌患者生命质量研究的中英文文献进行可视化分析。结果:检索得到中文文献1 285篇,英文文献871篇,中英文文献发文量均呈上升趋势,相关研究关注的重点主要是结直肠癌患者造口、抑郁、免疫、肠道功能、化疗及化疗药物,但机构之间、学者之间合作程度及研究类型等方面存在一定差异。结论:中文文献相关研究起步晚、发展快,但在研究质量与研究深度等方面与英文文献相比还有一定差距;国内学者之间、机构之间应加强合作,关心患者肠道功能、心理状况,提高患者体力活动水平,开展更多高质量研究。  相似文献   
10.
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