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   879篇
  免费   0篇
化学工业   4篇
金属工艺   1篇
建筑科学   1篇
轻工业   31篇
一般工业技术   4篇
冶金工业   835篇
自动化技术   3篇
  2017年   1篇
  2012年   3篇
  2011年   2篇
  2010年   1篇
  2009年   1篇
  2008年   2篇
  2007年   3篇
  2006年   3篇
  2005年   1篇
  2004年   6篇
  2003年   4篇
  2002年   3篇
  2001年   1篇
  2000年   1篇
  1999年   29篇
  1998年   223篇
  1997年   142篇
  1996年   108篇
  1995年   65篇
  1994年   45篇
  1993年   55篇
  1992年   6篇
  1991年   18篇
  1990年   10篇
  1989年   15篇
  1988年   18篇
  1987年   14篇
  1986年   10篇
  1985年   17篇
  1983年   1篇
  1981年   3篇
  1980年   5篇
  1979年   2篇
  1978年   1篇
  1977年   13篇
  1976年   47篇
排序方式: 共有879条查询结果,搜索用时 0 毫秒
51.
52.
53.
The purpose of this study was to examine the role of diabetes mellitus (DM) in infrainguinal bypass graft outcome. One hundred forty-four patients who underwent 170 infrainguinal bypass grafts from 1990 to 1995 were reviewed retrospectively. Seventy-eight patients (94 bypasses) had DM and were followed for an average of 15.4 months; 13 patients were lost to follow up. The mean age was 68 years; 44 (56.4%) were men. The major indication for intervention was limb salvage for the DM (87/94, 92.6%) and non-DM (56/76, 73.7%) groups. No significant difference was found for perioperative wound complications, hematoma, myocardial infarction, or deep venous thrombosis between the DM and non-DM groups. Early mortalities were three for DM and one for non-DM patients. No significant difference was found between primary patency (p = 0.71), secondary patency (p = 0.32), limb salvage (p = 0.99), and survival (p = 0.72) between DM and non-DM groups. DM patients were more likely to have significant tissue loss (p = 0.009) and a longer hospital stay (p = 0.01). In conclusion, infrainguinal vein bypass grafting can be performed successfully in diabetic patients with comparable patency and limb-salvage rates to those without DM.  相似文献   
54.
Skeletal fixation can be very beneficial to the recovery of wrist and hand function after a displaced fracture because it allows mobilization of soft tissues before the completion of fracture healing. The benefits of skeletal fixation can be greatly diminished, however, if excessive force causes the fixation to fail before fracture healing has occurred, infection occurs around the implant, or the patient develops reflex sympathetic dystrophy. Those complications, as well as others, are often caused by inappropriate or inadequate hand therapy. This article discusses the techniques needed to avoid many such complications while providing the best possible functional result for every patient.  相似文献   
55.
56.
Lymphocyte sensitization to measles has been studied in comparable groups of multiple sclerosis, other neurologic disease and normal subjects. The macrophage electrophoretic mobility test has been used. No difference between the three groups has been found, though there is a small group of children with obscure neurological disease which might well be multiple sclerosis and which fails to mount an adequate response to measles. The role of measles (and other banal infections) in aetiopathogenesis of multiple sclerosis is briefly discussed.  相似文献   
57.
A case of dermatitis artefacta is reported. The lesions were shown to contain silver and were probably caused by a silver nitrate caustic stick. The patient never admitted to having produced these lesions.  相似文献   
58.
59.
60.
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