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   157845篇
  免费   2422篇
  国内免费   136篇
耳鼻咽喉   4598篇
儿科学   5147篇
妇产科学   6219篇
基础医学   27941篇
口腔科学   3987篇
临床医学   8408篇
内科学   33037篇
皮肤病学   6426篇
神经病学   11322篇
特种医学   6502篇
外科学   24609篇
综合类   770篇
一般理论   51篇
预防医学   6337篇
眼科学   6083篇
药学   5626篇
中国医学   61篇
肿瘤学   3279篇
  2015年   3658篇
  2014年   4368篇
  2013年   6014篇
  2012年   4800篇
  2011年   4644篇
  2010年   4554篇
  2009年   4577篇
  2008年   4791篇
  2007年   4752篇
  2006年   5240篇
  2005年   4738篇
  2004年   4408篇
  2003年   2713篇
  2002年   1474篇
  1999年   1108篇
  1998年   1405篇
  1997年   1417篇
  1996年   1800篇
  1995年   1942篇
  1994年   1955篇
  1993年   1870篇
  1992年   1931篇
  1991年   1674篇
  1990年   1531篇
  1989年   1375篇
  1988年   1242篇
  1987年   1328篇
  1986年   1269篇
  1985年   1115篇
  1984年   1258篇
  1983年   1043篇
  1982年   1296篇
  1981年   1196篇
  1980年   1148篇
  1979年   1126篇
  1978年   1270篇
  1977年   1007篇
  1973年   1008篇
  1933年   1529篇
  1932年   1513篇
  1931年   1503篇
  1930年   1703篇
  1929年   1432篇
  1928年   1562篇
  1927年   1529篇
  1926年   1604篇
  1925年   1555篇
  1924年   1626篇
  1923年   1475篇
  1922年   1465篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
Presented in this work is a rare injury of a blunt abdominal trauma in a child. Besides a partial rupture of the kidney and a retro-/intraperitoneal haematoma, a further injury occurred from the accident: an initially clinically indetectable tear of the A. iliaca communis which was found intraoperatively and with systematic CT analysis. Traumatic blood vessel lesions of the abdominal aorta and in particular the iliac blood vessels are very rare in children. By such violent impact injuries, it is therefore vital to perform a clinical examination of the foot pulse, systematic analysis of radiology diagnostics, and intraoperative exploration. The growth phase should be considered for therapy of the blood vessels depending on the child's age group. As the long-term results of graft implants are practically unknown, if possible a primary suture or vein patch should be performed.  相似文献   
63.
Benign strictures of the biliary ducts are treated surgically in 90% of cases. Usually they are caused by trauma to the choledochous duct during gallbladder operations. Younger patients are frequently affected and, particularly if the strictures go untreated, can suffer from secondary complications such as cholangitis or secondary biliary cirrhosis with the serious dangers of portal hypertension and even hepatic failure and death. Although immediate treatment by end-to-end anastomosis has sometimes been described, this method is reasonable only for smooth cuts to the choledochous duct. Good long-term results have been achieved in 86% of cases with Roux-en-Y hepaticojejunostomy. In general, the best way to avoid complications is the all-important surgical maxim of correct indication for the primary operation. The best course is to limit the decision for surgery to symptomatic gallstones.  相似文献   
64.
65.
By oxygen concentration measurements (Oximeter Oxydig Dräger, Lübeck) in the EC 145 helicopter two oxygen transport and application systems were compared. The new liquid oxygen system (LOX) for the oxygen therapy was assessed in an application observation. For physical reasons fluid oxygen evaporates during the stand-by phase and an increased concentration (22.8% O2) in the exhaust valve of LOX arises. On the other hand a high oxygen concentration (22.7% O2) was measured in the operation mode of the conventional pressure flask gas system (GAS). No increased concentration could be measured within the helicopter cabin (HEMS, PAX) comparing both oxygen systems. For transport and application of oxygen with a very big reserve for the air dependent intensive transport the results show that LOX is a sure low pressure system (3.4 bar).  相似文献   
66.
Endotracheal intubation is required in 5–10% of all prehospital emergencies. Poor environmental conditions (e.g. limited space, poor or excessive lighting etc.), unfavorable patient-related factors (e.g. trauma, bleeding, pulmonary aspiration etc.) and the pressure of time make prehospital airway management a challenging procedure even for experienced emergency physicians. The incidence of difficult endotracheal intubation is significantly higher than in-hospital. Profound clinical practice, recognition and adequate treatment of complications of intubation, and ongoing clinical practice are essential for successful and responsible prehospital airway management. A brief physical examination helps to identify predictors for difficult intubation, thereby modifying treatment strategies. Every emergency physician must be closely familiar with at least one supraglottic airway device and the recent algorithms to manage the unanticipated difficult airway.  相似文献   
67.
Isolated fractures of the metacarpal and phalangeal bones are common injuries of the upper extremities. They usually occur at the age of 10–40, whereas the highest incidence is observed in childhood. The results of treatment have an important impact for the practical value of the hand. This article aims to give a brief overview of the different fracture types and their treatment options.  相似文献   
68.
69.
Aliskiren     
  相似文献   
70.
Während konventionelle zytotoxische Agenzien unspezifisch sind und nicht zwischen Tumorzelle und gesunder Wirtszelle unterscheiden, soll der gezielte therapeutische Eingriff in veränderte Signalkaskaden der Tumorzellen wirksame und gleichzeitig nebenwirkungsärmere Therapiemöglichkeiten eröffnen.  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