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   37407篇
  免费   2104篇
  国内免费   145篇
耳鼻咽喉   454篇
儿科学   2166篇
妇产科学   780篇
基础医学   4783篇
口腔科学   824篇
临床医学   2591篇
内科学   7635篇
皮肤病学   934篇
神经病学   1991篇
特种医学   898篇
外科学   5292篇
综合类   1340篇
一般理论   15篇
预防医学   2191篇
眼科学   1543篇
药学   3633篇
中国医学   290篇
肿瘤学   2296篇
  2023年   220篇
  2022年   560篇
  2021年   1215篇
  2020年   664篇
  2019年   898篇
  2018年   1088篇
  2017年   754篇
  2016年   1006篇
  2015年   1068篇
  2014年   1445篇
  2013年   1858篇
  2012年   2572篇
  2011年   2569篇
  2010年   1466篇
  2009年   1313篇
  2008年   1874篇
  2007年   1832篇
  2006年   1844篇
  2005年   1487篇
  2004年   1450篇
  2003年   1263篇
  2002年   1087篇
  2001年   839篇
  2000年   878篇
  1999年   737篇
  1998年   322篇
  1997年   224篇
  1996年   226篇
  1995年   219篇
  1994年   180篇
  1993年   153篇
  1992年   502篇
  1991年   410篇
  1990年   439篇
  1989年   401篇
  1988年   365篇
  1987年   363篇
  1986年   351篇
  1985年   329篇
  1984年   267篇
  1983年   224篇
  1982年   145篇
  1979年   238篇
  1978年   154篇
  1977年   187篇
  1975年   173篇
  1974年   185篇
  1973年   186篇
  1972年   175篇
  1971年   163篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
91.
92.
Torsion of greater omentum is a rare cause of acute abdomen. However, it should be included in the differential diagnoses in addition to acute cholecystitis, acute appendicitis, cecal diverticulitis, and other variable causes of acute abdomen. Diagnosis is usually made at laparotomy for suspected appendicitis. In some cases, computed tomography demonstrates a successful preoperative detection of omental torsion. We report a case of surgically and pathologically proven torsion with subsequent infarction of greater omentum presented as an acute abdominal pain.  相似文献   
93.
94.
In the present study 35 patients with preforated and 15 cases with intact ear drums, were studied and eustachian tube function was assessed by Saccharine test. Bortnick-Miller test, and manual impedance audiometry. The merits and demerits of one over the other were evaluated. It was observed thal more than one test when employed provides better information as every test has its own advantages and limitations  相似文献   
95.
Bengal gram seed coat appeared to be a potent hypocholesterolemic/hypolipidemic agent in rabbits. When fed to hypercholesterolemic rabbits, it lowered hepatic cholesterol/lipid much more than in the control group. Aortic lipid levels were rather marginally increased but the increase was less in Bengal gram seed coat fed rabbits. Though seed coat of Bengal gram failed to prevent the development of atherosclerosis in hypercholesterolemic rabbits, but certainly it slowed down the process of its development. The hypocholesterolemic action of Bengal gram seed coat appeared to be due to the increased catabolism and excretion of cholesterol.  相似文献   
96.
Buprenorphine was introduced as a potent analgesic with low abuse potential. Reports of buprenorphine abuse by opiate abusers have accumulated over the years, highlighting its use as a cheap alternative to heroin. The lower potency compared with heroin is being compensated by using a cocktail of buprenorphine with benzodiazepines or cyclizine. This study of 18 cases seen over 3 years broadly confirms these findings. Four cases reported haematemesis during acute withdrawal, a symptom not reported in earlier studies.  相似文献   
97.
Objective: To determine if drip infusion should be discontinued after full recovery of the patient from anaesthesia after minilaparotomy cholecystectomy in uncomplicated cases.Design: A randomised controlled clinical trial on 60 patients, from the waiting list, of cholelithiasis/cholecystitis operated by minilaparotomy cholecystectomy between November 1995 to March 1996. 30 patients did not receive postoperative IV drip infusion and in 30 patients 12–24 hours of standard drip transfusion was continued according to the current practice.Setting: Single Surgical Unit, SS Hospital, Banaras Hindu University, Varanasi, India.Main outcome measure: Recognition of clinical indication for continuation of. IV drip infusion after full recovery from anaesthesia.Results: In the cohorts of 30 patients each who were or were not given IV drip infusion after full recovery from anaesthesia following minilaparotomy cholecystectomy the observations on pulse rate, blood pressure, time to first voiding of urine and time to start first oral intake of fluids were identical. However postoperative urinary retention occured in 6 (20%) patients in whom the IV drip infusion was given.Conclusion: There is no clinical indication to continue IV drip infusion after full recovery from anaesthesia in patients operated for minilaparotomy cholecystectomy.  相似文献   
98.
99.
Serum ceruloplasmin levels were estimated in 81 patients within one week after an attack of acute myocardial infarction. A total of 126 healthy subjects were taken as controls and investigated for this copper containing protein. Results showed that there is an elevation in the levels of serum ceruloplasmin in patients as compared to the controls. Ceruloplasmin levels showed a return to almost normal values in 54 follow-up cases of acute myocardial infarction during the fourth week after infarction.  相似文献   
100.
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