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   106033篇
  免费   30819篇
  国内免费   1088篇
耳鼻咽喉   2475篇
儿科学   2897篇
妇产科学   2652篇
基础医学   4017篇
口腔科学   5268篇
临床医学   27171篇
内科学   25972篇
皮肤病学   3596篇
神经病学   13084篇
特种医学   3718篇
外科学   18491篇
综合类   191篇
现状与发展   40篇
一般理论   38篇
预防医学   14511篇
眼科学   2294篇
药学   1834篇
中国医学   29篇
肿瘤学   9662篇
  2024年   749篇
  2023年   5117篇
  2022年   1368篇
  2021年   3141篇
  2020年   5496篇
  2019年   2372篇
  2018年   7223篇
  2017年   7550篇
  2016年   8199篇
  2015年   8265篇
  2014年   10809篇
  2013年   12579篇
  2012年   4459篇
  2011年   4268篇
  2010年   7194篇
  2009年   9383篇
  2008年   4015篇
  2007年   2981篇
  2006年   4153篇
  2005年   2647篇
  2004年   1945篇
  2003年   1563篇
  2002年   1466篇
  2001年   1864篇
  2000年   1182篇
  1999年   1719篇
  1998年   2137篇
  1997年   1950篇
  1996年   1995篇
  1995年   1725篇
  1994年   1136篇
  1993年   949篇
  1992年   783篇
  1991年   671篇
  1990年   533篇
  1989年   550篇
  1988年   531篇
  1987年   391篇
  1986年   370篇
  1985年   322篇
  1984年   277篇
  1983年   323篇
  1982年   255篇
  1981年   235篇
  1980年   151篇
  1979年   81篇
  1978年   146篇
  1977年   141篇
  1976年   102篇
  1974年   88篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
42.
The profile and reach of physiotherapy has expanded in areas of extended scope of practice, and broader engagement with population needs beyond the individual treatment encounter. These changes raise increasingly complex ethical challenges evidenced by growth in physiotherapy-based ethics studies and discussions. This paper examines how a broad cross section of Australian physiotherapists perceive, interpret, and respond to ethical challenges in their work contexts and how professional codes of conduct are used in their practice. Using an interpretive qualitative methodology, purposive sampling of 88 members of national clinical special interest groups were recruited for focus group discussions. Narrative-based and thematic data analysis identified ethical challenges as emerging from specific clinical contexts, and influenced by health organizations, funding policies, workplace relationships, and individually held perspectives. Five themes were developed to represent these findings: (1) the working environment, (2) balancing diverse needs and expectation, (3) defining ethics, (4) striving to act ethically, and (5) talking about ethics. The results portray a diverse and complex ethical landscape where therapists encounter and grapple with ethical questions emerging from the impact of funding models and policies affecting clinical work, expanding boundaries and scope of practice and changing professional roles and relationships. Codes of conduct were described as foundational ethical knowledge but not always helpful for “in the moment” ethical decision-making. Based on this research, we suggest how codes of conduct, educators, and professional associations could cultivate and nurture ethics capability in physiotherapy practitioners for these contemporary challenges.  相似文献   
43.
44.
45.
46.
47.
48.
49.

Background

Limited data exists demonstrating the efficacy of minimally invasive surgery (MIS) compared to median sternotomy (MS) for multiple valvular disease (MVD). This systematic review and meta-analysis aims to compare operative and peri-operative outcomes of MIS vs MS in MVD.

Methods

PubMed, Ovid, and Embase were searched from inception until August 2019 for randomized and observational studies comparing MIS and MS in patients with MVD. Clinical outcomes of intra- and postoperative times, reoperation for bleeding and surgical site infection were evaluated.

Results

Five observational studies comparing 340 MIS vs 414 MS patients were eligible for qualitative and quantitative review. The quality of evidence assessed using the Newcastle-Ottawa scale was good for all included studies. Meta-analysis demonstrated increased cardiopulmonary bypass time for MIS patients (weighted mean difference [WMD], 0.487; 95% confidence interval [CI], 0.365-0.608; P < .0001). Similarly, aortic cross-clamp time was longer in patients undergoing MIS (WMD, 0.632; 95% CI, 0.509-0.755; P < .0001). No differences were found in operative mortality, reoperation for bleeding, surgical site infection, or hospital stay.

Conclusions

MIS for MVD have similar short-term outcomes compared to MS. This adds value to the use of minimally invasive methods for multivalvular surgery, despite conferring longer operative times. However, the paucity in literature and learning curve associated with MIS warrants further evidence, ideally randomized control trials, to support these findings.
  相似文献   
50.
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