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   196290篇
  免费   2674篇
  国内免费   164篇
耳鼻咽喉   1356篇
儿科学   7130篇
妇产科学   3862篇
基础医学   19172篇
口腔科学   2138篇
临床医学   14508篇
内科学   35453篇
皮肤病学   982篇
神经病学   17945篇
特种医学   9530篇
外国民族医学   3篇
外科学   32165篇
综合类   2784篇
现状与发展   1篇
一般理论   5篇
预防医学   19163篇
眼科学   3033篇
药学   10744篇
  1篇
中国医学   760篇
肿瘤学   18393篇
  2023年   165篇
  2022年   331篇
  2021年   679篇
  2020年   382篇
  2019年   630篇
  2018年   22533篇
  2017年   17814篇
  2016年   20003篇
  2015年   1554篇
  2014年   1640篇
  2013年   1766篇
  2012年   8458篇
  2011年   22503篇
  2010年   19633篇
  2009年   12275篇
  2008年   20653篇
  2007年   22883篇
  2006年   1647篇
  2005年   3277篇
  2004年   4406篇
  2003年   5211篇
  2002年   3388篇
  2001年   895篇
  2000年   978篇
  1999年   694篇
  1998年   365篇
  1997年   375篇
  1996年   206篇
  1995年   207篇
  1994年   209篇
  1993年   140篇
  1992年   301篇
  1991年   317篇
  1990年   330篇
  1989年   292篇
  1988年   186篇
  1987年   198篇
  1986年   146篇
  1985年   130篇
  1984年   120篇
  1983年   91篇
  1982年   68篇
  1981年   58篇
  1980年   77篇
  1979年   68篇
  1976年   59篇
  1974年   58篇
  1938年   60篇
  1932年   56篇
  1930年   46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.
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   
7.
8.
9.
10.
BACKGROUND: The recurrent chronic orofacial swelling caused by orofacial granulomatosis (OFG) can cause significant cosmetic and functional problems but can be prevented if the disease is diagnosed early and promptly treated. Although the enlargement of the lips is described to be the most common presenting complaint, the clinical onset of OFG may be characterized by minor associated mucosal and neurological manifestations, making early diagnosis very difficult or, sometimes, merely presumable. PATIENTS AND METHODS: We retrospectively analyzed the clinical manifestations of 19 patients with OFG, who were examined at our institution between 1998 and 2002, in order to determine their initial manifestations and presenting symptoms. RESULTS: A total of 10 patients showed classical recurrent enlargement of the lips (six lower; four upper) as presenting symptom. In the other nine patients, OFG onset was characterized by transient unilateral facial nerve palsy (two cases), intraoral manifestations (two cases), recurrent swelling of the periorbital area (two cases), of the chin (one case), of the zygomatic area (one case), and of the cheeks (one case). CONCLUSION: Our data underlined that OFG onset could be frequently characterized by widely variable, multiform, and temporary clinical findings. Involvement of atypical sites of the orofacial region and presence of single minor manifestations may occur as presenting symptoms, often preceding the development of traditional clinical findings.  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