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   198473篇
  免费   2062篇
  国内免费   111篇
医药卫生   200646篇
  2023年   116篇
  2022年   245篇
  2021年   488篇
  2020年   230篇
  2019年   339篇
  2018年   22320篇
  2017年   17641篇
  2016年   19825篇
  2015年   1284篇
  2014年   1322篇
  2013年   1451篇
  2012年   8010篇
  2011年   22132篇
  2010年   19392篇
  2009年   11997篇
  2008年   20421篇
  2007年   22763篇
  2006年   1742篇
  2005年   3334篇
  2004年   4435篇
  2003年   5394篇
  2002年   3529篇
  2001年   1080篇
  2000年   1228篇
  1999年   944篇
  1998年   520篇
  1997年   487篇
  1996年   329篇
  1995年   307篇
  1994年   284篇
  1993年   260篇
  1992年   607篇
  1991年   587篇
  1990年   603篇
  1989年   540篇
  1988年   492篇
  1987年   420篇
  1986年   401篇
  1985年   401篇
  1984年   245篇
  1983年   213篇
  1982年   139篇
  1980年   136篇
  1979年   179篇
  1978年   144篇
  1977年   103篇
  1974年   158篇
  1973年   120篇
  1970年   105篇
  1969年   125篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
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   
5.
6.
7.
A 23-year-old man was admitted for treatment of acute exacerbation of ileitis and perianal abscess caused by Crohn's disease. After incision and drainage of the abscess, coupled with antibiotic therapy, 6-mercaptopurine (6-MP) was commenced. His white blood cell (WBC) count on day 12 after initiation of 6-MP was not decreased. However, on day 24 he was re-admitted because of severe myelosuppression (WBC: 300/microl), which was complicated by the recurrence of the perianal abscess. Myelosuppression was prolonged and required the administration of granulocyte colony stimulating factor (G-CSF). G-CSF was continued for 17 days to achieve recovery of his WBC count to a normal level.  相似文献   
8.
9.
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