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   111370篇
  免费   45915篇
  国内免费   172篇
耳鼻咽喉   1989篇
儿科学   5035篇
妇产科学   1249篇
基础医学   22815篇
口腔科学   5842篇
临床医学   15234篇
内科学   29798篇
皮肤病学   8312篇
神经病学   17066篇
特种医学   4092篇
外科学   19070篇
综合类   203篇
一般理论   36篇
预防医学   5936篇
眼科学   2105篇
药学   8193篇
中国医学   1036篇
肿瘤学   9446篇
  2022年   222篇
  2021年   1626篇
  2020年   5301篇
  2019年   11176篇
  2018年   10561篇
  2017年   11785篇
  2016年   12584篇
  2015年   12478篇
  2014年   12528篇
  2013年   13439篇
  2012年   5808篇
  2011年   5866篇
  2010年   10047篇
  2009年   6361篇
  2008年   4046篇
  2007年   2948篇
  2006年   2898篇
  2005年   2811篇
  2004年   2658篇
  2003年   2654篇
  2002年   2831篇
  2001年   1226篇
  2000年   1085篇
  1999年   757篇
  1998年   627篇
  1997年   496篇
  1996年   449篇
  1995年   416篇
  1994年   366篇
  1993年   314篇
  1992年   322篇
  1991年   319篇
  1990年   261篇
  1989年   233篇
  1988年   227篇
  1987年   199篇
  1986年   190篇
  1985年   214篇
  1984年   232篇
  1983年   210篇
  1982年   250篇
  1981年   213篇
  1933年   236篇
  1932年   235篇
  1931年   216篇
  1930年   238篇
  1928年   218篇
  1927年   194篇
  1926年   207篇
  1925年   202篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.

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   
13.
14.
15.
16.
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   
17.
18.
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   
19.
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