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   92887篇
  免费   29975篇
  国内免费   1065篇
耳鼻咽喉   2379篇
儿科学   2483篇
妇产科学   2237篇
基础医学   1973篇
口腔科学   4997篇
临床医学   25528篇
内科学   23711篇
皮肤病学   3213篇
神经病学   11842篇
特种医学   3470篇
外科学   17331篇
综合类   96篇
现状与发展   40篇
一般理论   1篇
预防医学   13037篇
眼科学   2066篇
药学   910篇
中国医学   7篇
肿瘤学   8606篇
  2024年   740篇
  2023年   5006篇
  2022年   1076篇
  2021年   2644篇
  2020年   5263篇
  2019年   1920篇
  2018年   6768篇
  2017年   7239篇
  2016年   7811篇
  2015年   7883篇
  2014年   10262篇
  2013年   11890篇
  2012年   3412篇
  2011年   3155篇
  2010年   6616篇
  2009年   8927篇
  2008年   3188篇
  2007年   2102篇
  2006年   3303篇
  2005年   1853篇
  2004年   1283篇
  2003年   955篇
  2002年   897篇
  2001年   1781篇
  2000年   1110篇
  1999年   1650篇
  1998年   2035篇
  1997年   1871篇
  1996年   1929篇
  1995年   1666篇
  1994年   1064篇
  1993年   897篇
  1992年   732篇
  1991年   617篇
  1990年   498篇
  1989年   510篇
  1988年   495篇
  1987年   372篇
  1986年   344篇
  1985年   284篇
  1984年   248篇
  1983年   298篇
  1982年   221篇
  1981年   193篇
  1980年   116篇
  1978年   120篇
  1977年   122篇
  1976年   84篇
  1974年   72篇
  1972年   71篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
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   
42.
43.
44.
45.
46.
47.
48.

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   
49.
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