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   206360篇
  免费   2637篇
  国内免费   147篇
医药卫生   209144篇
  2022年   164篇
  2021年   346篇
  2020年   295篇
  2019年   499篇
  2018年   22405篇
  2017年   17737篇
  2016年   19972篇
  2015年   1521篇
  2014年   1538篇
  2013年   1884篇
  2012年   8456篇
  2011年   22538篇
  2010年   19853篇
  2009年   12520篇
  2008年   21160篇
  2007年   23359篇
  2006年   2238篇
  2005年   3993篇
  2004年   5064篇
  2003年   6002篇
  2002年   4241篇
  2001年   589篇
  2000年   661篇
  1999年   536篇
  1998年   693篇
  1997年   607篇
  1996年   449篇
  1995年   432篇
  1994年   382篇
  1993年   313篇
  1992年   244篇
  1991年   284篇
  1990年   290篇
  1989年   232篇
  1988年   219篇
  1987年   171篇
  1986年   148篇
  1985年   185篇
  1984年   199篇
  1983年   181篇
  1982年   221篇
  1981年   169篇
  1980年   170篇
  1938年   179篇
  1933年   183篇
  1932年   230篇
  1931年   167篇
  1930年   210篇
  1928年   163篇
  1926年   164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.
Gastroesophageal reflux is the most common benign disorder of the esophagus and laparoscopic Nissen fundoplication has become the standard surgical treatment for its treatment. In our area, where the use of bougie calibration is debatable, postoperative dysphagia is encountered often after this surgery although it is usually not permanent. The aim of this study was to investigate the effect of using a soft silicone tube 39 F in diameter for esophageal calibration during laparoscopic Nissen fundoplication on the incidence of postoperative dysphagia. We divided cases scheduled to undergo laparoscopic Nissen fundoplication between January 2009 and November 2010 into two groups, each consisting 25 patients. Esophageal calibration with a 39 F silicone orogastric tube was used for the first group while there was no operative calibration in the second group. The surgical duration was recorded; the presence and severity of the postoperative dysphagia was calculated by using a dysphagia severity scoring system during the 1-year postoperative follow-up. The dysphagia severity scores were significantly lower in group 1 than group 2 on the postoperative second day and at the end of the first week and first month. We did not find a significant difference at the end of the 6-month and first year. There was also no significant difference regarding surgery duration. The use of a soft orogastric tube 39 F in diameter for esophagus calibration during laparoscopic Nissen fundoplication has significantly decreased the incidence of postoperative transient dysphagia without affecting the duration of surgery. Although dysphagia gradually resolves in the majority of patients, a safe and easy calibration method for its prevention is worth developing, and we believe that the use of our method in larger series could be beneficial.  相似文献   
8.
9.
In developing countries, like Indonesia, apheresis is still a relative new procedure. Nowadays, therapeutic apheresis procedures are performed in the field of hematology and neurology, especially in the teaching hospitals in Indonesia. Therapeutic apheresis procedure, that is, leukocytapheresis, therapeutic plasma exchange (TPE), and thrombocytapheresis are already performed. In the period 2009–2013, 204 apheresis procedures in 137 patients to reduce the leukocytes, 72 TPE procedures in 17 patients, and 14 thrombocyte reductions were performed in the Sardjito hospital, Yogyakarta, Indonesia. In the future, to improve the therapeutic apheresis implementation, it is important to increase the insurance coverage and also should be considered to introduce the apheresis medicine into the curriculum of appropriate physician programs in Indonesia. Especially in Indonesia, a lot of efforts are still being needed to improve implementation of therapeutic apheresis. J. Clin. Apheresis 30:139–140, 2015. © 2014 Wiley Periodicals, Inc.  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