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   863654篇
  免费   54818篇
  国内免费   1667篇
耳鼻咽喉   11351篇
儿科学   27798篇
妇产科学   21271篇
基础医学   132909篇
口腔科学   25495篇
临床医学   72880篇
内科学   168887篇
皮肤病学   20421篇
神经病学   62103篇
特种医学   29522篇
外国民族医学   79篇
外科学   122604篇
综合类   15563篇
现状与发展   2篇
一般理论   186篇
预防医学   70633篇
眼科学   20457篇
药学   66114篇
  3篇
中国医学   3022篇
肿瘤学   48839篇
  2021年   7894篇
  2019年   8242篇
  2018年   12667篇
  2017年   9080篇
  2016年   9779篇
  2015年   10883篇
  2014年   13985篇
  2013年   21012篇
  2012年   30246篇
  2011年   31864篇
  2010年   17806篇
  2009年   15660篇
  2008年   28402篇
  2007年   30597篇
  2006年   30550篇
  2005年   28702篇
  2004年   27641篇
  2003年   26105篇
  2002年   25280篇
  2001年   40740篇
  2000年   41856篇
  1999年   34140篇
  1998年   8550篇
  1997年   7068篇
  1996年   7383篇
  1995年   6995篇
  1994年   6400篇
  1992年   25024篇
  1991年   24786篇
  1990年   24149篇
  1989年   23656篇
  1988年   21544篇
  1987年   20830篇
  1986年   19918篇
  1985年   18662篇
  1984年   13674篇
  1983年   11582篇
  1982年   6372篇
  1979年   12657篇
  1978年   8885篇
  1977年   7571篇
  1976年   7294篇
  1975年   8099篇
  1974年   9588篇
  1973年   9263篇
  1972年   8728篇
  1971年   8166篇
  1970年   7852篇
  1969年   7345篇
  1968年   6848篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
One hundred insulin-dependent diabetic patients (age < 45 years, 53 smokers) were followed for six years. The age, duration of diabetes and mean glycated haemoglobin levels, were comparable between the smokers and non-smokers. Microvascular complications (retinopathy and increased urine albumin excretion) were commoner and more severe in the smoking group at six years, particularly in heavy smokers. Of the 45 original smokers reviewed at six years, 12 (27%) had stopped, six of whom had developed microvascular complications. Only two of the ''heavy'' initial smokers, likely to be at most risk, had stopped smoking, and three original non-smokers had started smoking.  相似文献   
992.
993.
994.
995.
996.
The talar beak is a well-described secondary sign of talocalcaneal coalition but is not pathognomonic of the condition and may be seen in other causes of restricted or abnormal subtalar motion. We present an unusual complication of talar beaks in two patients who sustained fractures through their beaks. One of the patients described did not have a talocalcaneal coalition but had developed a beak following a compound fracture dislocation of the ankle joint complicated by infection, a previously undescribed predisposing cause.  相似文献   
997.
998.
999.
Background: Patients who suffer with gastroesophageal reflux Disease (GERD) endure a worsening of symptoms as their weight increases. When medical treatment of this condition in the morbidly obese patients fails, surgical intervention may be indicated. Choosing a procedure which not only helps achieve weight control but which also relieves symptoms and complications of GERD is the goal. We present a review of patients who have undergone Roux-en-Y Gastric Bypass (RYGBP) and related procedures for this disease. Methods: One hundred eighty-eight patients undergoing surgery for morbid obesity and for GERD in 1992-1996 were contacted by mail or phone. All of these patients had undergone preoperative esophagogastroduodenoscopy to grade the severity of their disease. Their preoperative symptoms were compared to those experienced postoperatively. Results: One hundred thirty patients underwent a RYGBP with modified Hill fundopexy, 22 patients underwent a distal gastrectomy with modified Hill fundopexy, 8 patients underwent distal gastrectomy alone and 28 patients underwent RYGBP alone. There have been no deaths. There were nine surgical complications, eight early and one at 2.5 years postoperation. Follow-up is 4-48 months. The average BMI dropped from 43 to 30.2 kg/m2. Whereas all patients were on some form of medical therapy before surgery, only 14 reported the need for medication postoperatively. Conclusions: Surgical intervention for weight control and treatment of GERD has been highly successful in our experience both with respect to weight control and to the reduction of reflux symptoms. Depending upon endoscopic and operative findings a RYGBP with or without an antireflux procedure can provide dramatic improvement. Gastrectomy with antireflux modifications is appropriate in selected cases.  相似文献   
1000.
The efficacy of local application of Nitrobid oinment in the treatment of idiopathic sudden sensorineural hearing loss has been presented Overall good to fair recovery occured in 40% of the patients, important prognostic indicators were found to be severity of initial hearing loss, time from onset to initial visit, age of the patient and hearing status of the opposite ear.  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