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   81759篇
  免费   44720篇
  国内免费   46篇
耳鼻咽喉   1619篇
儿科学   4464篇
妇产科学   588篇
基础医学   16690篇
口腔科学   5331篇
临床医学   12749篇
内科学   24855篇
皮肤病学   7706篇
神经病学   14013篇
特种医学   2407篇
外科学   15293篇
综合类   57篇
一般理论   21篇
预防医学   4238篇
眼科学   1372篇
药学   6141篇
中国医学   1029篇
肿瘤学   7952篇
  2023年   48篇
  2022年   71篇
  2021年   1383篇
  2020年   5091篇
  2019年   10902篇
  2018年   10194篇
  2017年   11512篇
  2016年   12179篇
  2015年   12022篇
  2014年   11926篇
  2013年   12454篇
  2012年   4380篇
  2011年   4311篇
  2010年   9042篇
  2009年   5404篇
  2008年   2255篇
  2007年   1178篇
  2006年   1207篇
  2005年   1054篇
  2004年   1020篇
  2003年   1058篇
  2002年   1172篇
  2001年   1161篇
  2000年   1127篇
  1999年   655篇
  1998年   164篇
  1997年   136篇
  1996年   122篇
  1995年   119篇
  1994年   96篇
  1993年   83篇
  1992年   305篇
  1991年   288篇
  1990年   255篇
  1989年   240篇
  1988年   198篇
  1987年   222篇
  1986年   181篇
  1985年   186篇
  1984年   138篇
  1983年   110篇
  1982年   48篇
  1979年   107篇
  1978年   71篇
  1977年   61篇
  1971年   58篇
  1969年   45篇
  1968年   54篇
  1967年   44篇
  1966年   47篇
排序方式: 共有10000条查询结果,搜索用时 125 毫秒
11.
12.
13.

Background and objectives

A prompt and effective management of trauma patient is necessary. The aim of this case report is to highlight the importance of intraoperative echocardiography as a useful tool in patients suffering from refractory hemodynamic instability no otherwise explained.

Case report

A 41 year‐old woman suffered a car accident. At the emergency department, no abnormalities were found in ECG or chest X‐ray. Abdominal ultrasound revealed the presence of abdominal free liquid and the patient was submitted to urgent exploratory laparotomy. Nevertheless, she persisted suffering arterial hypotension and metabolic acidosis. Looking for the reason of her hemodynamic instability, intraoperative transthoracic echocardiography was performed, finding out the presence of pericardial effusion. Once the cardiac surgeon extracted pericardial clots, patient's situation improved clinically and analytically.

Conclusion

Every anesthesiologist should be able to use the intraoperative echocardiography as an effective tool in order to establish the appropriate measures to promote the survival of patients suffering severe trauma.  相似文献   
14.
15.
16.
17.
Direct peroral cholangioscopy (POC) using an ultra‐slim upper endoscope is one modality of POC for intraductal endoscopic evaluation and treatment of the bile duct. Choledochoduodenostomy (CDS) is one modality of biliary bypass surgery that provides a new route to the bile duct. We carried out direct POC using an ultra‐slim upper endoscope without the use of accessories in 10 patients (four sump syndromes, three bile duct strictures and three intrahepatic duct stones) previously undergoing surgical CDS. Direct POC was successful in all patients. The use of an intraductal balloon catheter was required in one patient for advancement of the endoscope into the bile duct. Distal bile ducts with sump syndromes were cleared using baskets and water irrigation under direct POC. Cholangiocarcinoma was diagnosed in one patient with hilar bile duct stricture after cholangioscopic evaluation and a targeting forceps biopsy under direct POC. Intrahepatic duct stones were successfully extracted after intraductal fragmentation under direct POC. Oozing bleeding occurred during intraductal lithotripsy but stopped spontaneously. Direct POC using an ultra‐slim upper endoscope without the assistance of accessories can easily be carried out in patients undergoing CDS.  相似文献   
18.
19.
Acne vulgaris (acne) is a chronic inflammatory disease of the sebaceous gland, characterized by follicular hyperkeratinization, excessive colonization by Propionibacterium acnes (Pacnes) as well as immune reactions and inflammation. Despite an armamentarium of topical treatments available including benzoyl peroxide, retinoids and azelaic acid, topical antibiotics in monotherapies, especially erythromycin and clindamycin, are still used in Europe to treat acne. This intensive use led to antimicrobial‐resistant P. acnes and staphylococci strains becoming one of the main health issues worldwide. This is an update on the current topical acne treatments available in Europe, their mechanism of action, their potential to induce antimicrobial resistance and their clinical efficacy and safety.  相似文献   
20.
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