首页 | 官方网站   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   36684篇
  免费   1910篇
  国内免费   142篇
医药卫生   38736篇
  2023年   174篇
  2021年   629篇
  2020年   369篇
  2019年   482篇
  2018年   612篇
  2017年   530篇
  2016年   658篇
  2015年   630篇
  2014年   805篇
  2013年   1013篇
  2012年   1657篇
  2011年   1700篇
  2010年   1034篇
  2009年   901篇
  2008年   1543篇
  2007年   1777篇
  2006年   1662篇
  2005年   1591篇
  2004年   1614篇
  2003年   1494篇
  2002年   1538篇
  2001年   1323篇
  2000年   1424篇
  1999年   1288篇
  1998年   491篇
  1997年   393篇
  1996年   370篇
  1995年   315篇
  1994年   315篇
  1993年   293篇
  1992年   996篇
  1991年   854篇
  1990年   821篇
  1989年   810篇
  1988年   760篇
  1987年   765篇
  1986年   669篇
  1985年   630篇
  1984年   428篇
  1983年   343篇
  1979年   296篇
  1978年   205篇
  1977年   179篇
  1974年   195篇
  1973年   163篇
  1972年   161篇
  1971年   182篇
  1970年   156篇
  1969年   177篇
  1968年   147篇
排序方式: 共有10000条查询结果,搜索用时 328 毫秒
1.
2.
3.
4.
Background: Few new Residency Program Directors (PD) are formally trained for the demands and responsibilities of the leadership aspect of their role. Currently, there are no comprehensive frameworks that describe specific leadership competencies that can inform PD self-reflection or faculty development.

Methods: The authors developed a Postgraduate Program Director Competency Inventory (PPDCI) in order to frame the performance of PDs for a multisource feedback (MSF) program. The development of the PPDCI occurred in five phases which involved: development of an initial inventory, implementation of a key informant survey of national opinion leaders, execution of a validity survey with postgraduate education leaders and committee members and implementation of a further refined inventory with 17 PD and 147 raters as part of a pilot MSF program.

Outcomes: Five distinct domains of leadership competence were identified which included: Communication and relationship management, leadership, professionalism and self-management, environmental engagement, and management skills and knowledge. The content validity of the PPDCI was endorsed by 85% of the key informants. The validity survey indicated strong endorsement of the PPDCI domains and recognition of its utility for both orientation of new PD as well as a frame for self-assessment. The pilot MSF program yielded a further refined and reduced inventory of 26 items of competence as well as recommendations for its utility.

Conclusions: Use of this leadership inventory has the potential to ensure effective leadership of postgraduate programs.  相似文献   
5.
6.
We report a case of a diaphragmatic hernia after a heart transplant operation. A 43-year-old woman, who underwent orthotropic heart transplantation for hypertrophic cadiomyopathy two year earlier, presented with vomiting and epigastric pain. A computed tomography scan showed that the stomach and transverse colon were dislocated in the left thoracic cavity. We diagnosed left diaphragmatic hernia incarceration and performed laparoscopic repair of the diaphragmatic hernia. A 12 × 8 cm diaphragmatic defect was found intraoperatively on the ventrolateral aspect of the left diaphragm, and the stomach with volvulus had herniated into the thorax through the defect. The hernia was considered to be iatrogenic. The diaphragmatic defect was large, and the diaphragm was thinning. We closed the defect by mesh repair. Laparoscopic mesh repair of the diaphragmatic hernia could be performed safely and with minimal invasiveness.  相似文献   
7.
8.
9.
Kohmoto  Tomohiro  Masuda  Kiyoshi  Shoda  Katsutoshi  Takahashi  Rizu  Ujiro  Sae  Tange  Shoichiro  Ichikawa  Daisuke  Otsuji  Eigo  Imoto  Issei 《Gastric cancer》2020,23(3):403-417
Gastric Cancer - We aimed to identify novel tumor-promoting drivers highly expressed in gastric cancer (GC) that contribute to worsened prognosis in affected patients. Genes whose expression was...  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-23

京公网安备 11010802026262号