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   212138篇
  免费   4710篇
  国内免费   55篇
耳鼻咽喉   1575篇
儿科学   8029篇
妇产科学   3747篇
基础医学   21496篇
口腔科学   2080篇
临床医学   16953篇
内科学   36978篇
皮肤病学   1262篇
神经病学   20070篇
特种医学   9976篇
外国民族医学   1篇
外科学   33972篇
综合类   3371篇
一般理论   32篇
预防医学   22459篇
眼科学   3293篇
药学   12171篇
中国医学   671篇
肿瘤学   18767篇
  2023年   287篇
  2022年   396篇
  2021年   906篇
  2020年   535篇
  2019年   905篇
  2018年   22805篇
  2017年   17990篇
  2016年   20128篇
  2015年   1712篇
  2014年   1920篇
  2013年   2383篇
  2012年   9236篇
  2011年   23228篇
  2010年   19980篇
  2009年   12653篇
  2008年   21319篇
  2007年   23627篇
  2006年   2423篇
  2005年   3990篇
  2004年   5005篇
  2003年   5891篇
  2002年   4015篇
  2001年   1294篇
  2000年   1349篇
  1999年   984篇
  1998年   591篇
  1997年   524篇
  1996年   420篇
  1995年   370篇
  1994年   380篇
  1993年   328篇
  1992年   668篇
  1991年   662篇
  1990年   718篇
  1989年   643篇
  1988年   509篇
  1987年   517篇
  1986年   409篇
  1985年   458篇
  1984年   362篇
  1983年   312篇
  1982年   250篇
  1980年   223篇
  1979年   286篇
  1978年   244篇
  1977年   199篇
  1976年   200篇
  1974年   246篇
  1973年   202篇
  1969年   189篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
BackgroundThe aim of this paper is to assess the current state of quality and outcomes measures being reported for hepatic resections in the recent literature.MethodsMedline and PubMed databases were searched for English language articles published between 1 January 2002 and 30 April 2013. Two examiners reviewed each article and relevant citations for appropriateness of inclusion, which excluded papers of liver donor hepatic resections, repeat hepatectomies or meta-analyses. Data were extracted and summarized by two examiners for analysis.ResultsFifty-five studies were identified with suitable reporting to assess peri-operative mortality in hepatic resections. In only 35% (19/55) of the studies was the follow-up time explicitly stated, and in 47% (26/55) of studies peri-operative mortality was limited to in-hospital or 30 days. The time period in which complications were captured was not explicitly stated in 19 out of 28 studies. The remaining studies only captured complications within 30 days of the index operation (8/28). There was a paucity of quality literature addressing truly patient-centred outcomes.ConclusionQuality outcomes after a hepatic resection are inconsistently reported in the literature. Quality outcome studies for a hepatectomy should report mortality and morbidity at a minimum of 90 days after surgery.  相似文献   
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.
Pancreatic panniculitis is an uncommon condition that can occur in association with pancreatic disease. We present a case of pancreatic panniculitis in a female pancreas-kidney transplant recipient 5 months post-transplant. The patient was on standard immunosuppressive medications and had acute rejection of her renal allograft. The diagnosis of allograft pancreatitis and rejection presenting with pancreatic panniculitis was supported clinically, histopathologically and by laboratory and imaging data. This is the fourth case of pancreatic panniculitis occurring in a transplant recipient and the first in a simultaneous pancreas-kidney transplant recipient. It is also the first case associated with allograft rejection. Clinicians should be aware that pancreatic panniculitis may be a manifestation of underlying allograft pancreatic disease.  相似文献   
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