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   4643篇
  免费   166篇
  国内免费   44篇
耳鼻咽喉   116篇
儿科学   253篇
妇产科学   289篇
基础医学   347篇
口腔科学   174篇
临床医学   347篇
内科学   906篇
皮肤病学   68篇
神经病学   315篇
特种医学   231篇
外科学   1143篇
综合类   64篇
一般理论   1篇
预防医学   100篇
眼科学   173篇
药学   148篇
中国医学   15篇
肿瘤学   163篇
  2023年   29篇
  2022年   41篇
  2021年   88篇
  2020年   70篇
  2019年   65篇
  2018年   117篇
  2017年   85篇
  2016年   133篇
  2015年   152篇
  2014年   187篇
  2013年   224篇
  2012年   322篇
  2011年   289篇
  2010年   185篇
  2009年   152篇
  2008年   297篇
  2007年   397篇
  2006年   353篇
  2005年   364篇
  2004年   329篇
  2003年   285篇
  2002年   232篇
  2001年   98篇
  2000年   70篇
  1999年   57篇
  1998年   40篇
  1997年   33篇
  1996年   26篇
  1995年   21篇
  1994年   19篇
  1993年   8篇
  1992年   21篇
  1991年   12篇
  1990年   5篇
  1989年   3篇
  1988年   2篇
  1987年   3篇
  1986年   3篇
  1985年   2篇
  1984年   2篇
  1983年   2篇
  1982年   4篇
  1979年   2篇
  1978年   2篇
  1976年   5篇
  1974年   3篇
  1970年   2篇
  1966年   2篇
  1963年   2篇
  1959年   1篇
排序方式: 共有4853条查询结果,搜索用时 250 毫秒
991.
992.
993.
Here, we report a case of a 17‐year old female with Wilson's disease presenting with progressive Coombs' negative hemolytic anemia and hepatic cirrhosis who was treated with one session of therapeutic plasma exchange (TPE) and clinically improved. In clinical situations where multiple sessions of TPE may not be possible, the use of a single session of TPE in conjunction with conventional therapy may be of benefit in preventing further clinical deterioration. J. Clin. Apheresis, 2009. © 2009 Wiley‐Liss, Inc.  相似文献   
994.
Spontaneous rupture of intrahepatic biliary ducts is a rare cause of acute abdomen due to biliary peritonitis. We report a 92-year-old woman with 48-h history of upper abdominal pain, nausea and vomiting and peritoneal signs. CT scan showed free fluid in the abdomen and mild dilatation of the common bile duct. Exploratory laparotomy showed bile in the abdominal cavity with leak-age from a ruptured bile duct radicle in segment 3, as confirmed on intraoperative cholangiography. She underwent cholecystectomy, choledochotomy with removal of gallstones, repair of the perforation with primary suture and placement of a T-tube. She had an uneventful recovery.  相似文献   
995.
996.
997.
The anterior jaw bones are often considered relatively safe surgical sites. Nonetheless, the increasing rate of surgical interventions in that area, such as oral implant placement and bone grafting, has highlighted the potential risks and has raised the reported complications. A careful documentation of all anatomic variations in anterior jaw bone neurovascularization has thus become necessary. The present report attempts to revisit jaw bone neurovascularization, addressing typical anatomic appearances and variations. We summarize the results of various microanatomical studies carried out by high-resolution magnetic resonance imaging (HR-MRI) of the human anterior jaw bones. These studies reveal that edentulous and dentate anterior jaws present significant variation in the occurrence of the mandibular incisive canal and genial spinal foramina, as well as the maxillary nasopalatine canal. All of these canal structures contain a neurovascular bundle, whose diameter may be large enough to cause clinically significant trauma. A careful presurgical radiographic analysis of the anterior jaw bones is therefore advised.  相似文献   
998.
Innominate osteotomy of Salter remains the most commonly used pelvic osteotomy for children in the age of 18 months to 6 years. Kirschner wire is inserted across the osteotomy site to fix the bone graft. We present an unusual case of migration of Kirschner wire through the abdominal region. Migration of pins to the femoral head is well-known complication. To our knowledge, this is the first case reporting migration of Kirschner wire through the abdominal region.  相似文献   
999.
Acute exacerbations, most of which are due to lower respiratory tract infections, cause great morbidity and mortality in patients with chronic obstructive pulmonary disease (COPD) and most of these are due to lower respiratory tract infections. The aim of this study was to determine the causative organism and the effects of azithromycin, ampicillin sulbactam (sultamicillin), ciprofloxacin and cefaclor monohydrate therapy in COPD. One hundred and six patients with COPD in acute exacerbation were randomized into four groups for empiric antibiotic treatment following lung function tests and sputum examination. The most common strains isolated from sputum were Haemophilus influenzae (30.8%), Streptoccocus pneumoniae (12%) and Moraxella catarrhalis (7.7%). Azithromycin, sultamicillin, ciprofloxacin and cefaclor monohydrate were found to be effective in treating COPD exacerbations.  相似文献   
1000.
A series of anomalous arterial supply of the arm and shoulder is presented. In these cases, the deep brachial artery arose from a common trunk with posterior circumflex humeral artery. In one case, the superior ulnar collateral artery and deep brachial artery originated from the posterior circumflex humeral artery. The common trunk or posterior circumflex humeral artery arose from the brachial artery at the level of the lower border of the teres major (at the origin of the brachial artery). A possible ontogenetic explanation is provided for this situation. Awareness of the variations of arteries of the arm or shoulder is important for angiographers and the surgeon who operates in this region. Preliminary part of this study was presented at the 1st Joint Meeting of EACA (European Association of Clinical Anatomy), AACA (American Association of Clinical Anatomists), Graz, Austria, 7–11 July, 2003.  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