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   218460篇
  免费   49859篇
  国内免费   637篇
耳鼻咽喉   2922篇
儿科学   7751篇
妇产科学   3170篇
基础医学   35111篇
口腔科学   7694篇
临床医学   27278篇
内科学   52894篇
皮肤病学   9709篇
神经病学   27693篇
特种医学   7424篇
外国民族医学   11篇
外科学   33953篇
综合类   1609篇
一般理论   107篇
预防医学   15493篇
眼科学   3381篇
药学   15003篇
中国医学   1199篇
肿瘤学   16554篇
  2023年   922篇
  2022年   1676篇
  2021年   4436篇
  2020年   6828篇
  2019年   13379篇
  2018年   13337篇
  2017年   13651篇
  2016年   14699篇
  2015年   14928篇
  2014年   16074篇
  2013年   18206篇
  2012年   13748篇
  2011年   13787篇
  2010年   14308篇
  2009年   10409篇
  2008年   10672篇
  2007年   10125篇
  2006年   9502篇
  2005年   9233篇
  2004年   8633篇
  2003年   7965篇
  2002年   7899篇
  2001年   2963篇
  2000年   2756篇
  1999年   2318篇
  1998年   1773篇
  1997年   1489篇
  1996年   1173篇
  1995年   1167篇
  1994年   998篇
  1993年   906篇
  1992年   1367篇
  1991年   1273篇
  1990年   1202篇
  1989年   1131篇
  1988年   1011篇
  1987年   922篇
  1986年   991篇
  1985年   962篇
  1984年   809篇
  1983年   722篇
  1982年   715篇
  1981年   603篇
  1980年   513篇
  1979年   595篇
  1978年   486篇
  1977年   445篇
  1975年   399篇
  1974年   427篇
  1973年   397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.
6.
7.
8.

Background

Physicians treating nonvalvular atrial fibrillation (AF) assess stroke and bleeding risks when deciding on anticoagulation. The agreement between empirical and physician-estimated risks is unclear. Furthermore, the association between patient and physician sex and anticoagulation decision-making is uncertain.

Methods

We pooled data from 2 national primary care physician chart audit databases of patients with AF (Facilitating Review and Education to Optimize Stroke Prevention in Atrial Fibrillation and Coordinated National Network to Engage Physicians in the Care and Treatment of Patients with Atrial Fibrillation Chart Audit) with a combined 1035 physicians (133 female, 902 male) and 10,927 patients (4567 female and 6360 male).

Results

Male physicians underestimated stroke risk in female patients and overestimated risk in male patients. Female physicians estimated stroke risk well in female patients but underestimated the risk in male patients. Risk of bleeding was underestimated in all. Despite differences in risk assessment by physician and patient sex, > 90% of patients received anticoagulation across all subgroups. There was modest agreement between physician estimated and calculated (ie, CHADS2 score) stroke risk: Kappa scores were 0.41 (0.35-0.47) for female physicians and 0.34 (0.32-0.36) for male physicians.

Conclusions

Our study is the first to examine the association between patient and physician sex influences and stroke and bleeding risk estimation in AF. Although there were differences in agreement between physician estimated stroke risk and calculated CHADS2 scores, these differences were small and unlikely to affect clinical practice; further, despite any perceived differences in the accuracy of risk assessment by sex, most patients received anticoagulation.  相似文献   
9.
10.
Laparoscopic surgery has several advantages over traditional surgery because it has been shown to be less invasive. The next logical step in the evolution of minimally invasive surgery may be to eliminate all abdominal incisions. The natural orifices provide a port of entry via the gastrointestinal tract to the peritoneal cavity. This approach would require the creation of a perforation, which is considered to be a major complication of endoscopy with significant morbidity and mortality. However, there are several recent studies that have described the technical feasibility and safety of a per‐oral transgastric approach to the peritoneal cavity using conventional endoscopes. Theoretically, this approach could reduce postoperative abdominal wall pain, wound infection, hernia formation, and adhesions. This article aims to summarize the current status of transgastric surgery, currently referred to as natural orifice transluminal endoscopic surgery (NOTES), and to address some of its future challenges.  相似文献   
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