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   1324478篇
  免费   98820篇
  国内免费   1748篇
耳鼻咽喉   16754篇
儿科学   42691篇
妇产科学   35982篇
基础医学   197702篇
口腔科学   36070篇
临床医学   124208篇
内科学   260335篇
皮肤病学   28115篇
神经病学   107613篇
特种医学   48626篇
外国民族医学   266篇
外科学   187235篇
综合类   26475篇
现状与发展   3篇
一般理论   634篇
预防医学   110131篇
眼科学   29555篇
药学   96718篇
  8篇
中国医学   2095篇
肿瘤学   73830篇
  2019年   11131篇
  2018年   14930篇
  2017年   11374篇
  2016年   12436篇
  2015年   14426篇
  2014年   19973篇
  2013年   30219篇
  2012年   41889篇
  2011年   44368篇
  2010年   25572篇
  2009年   24467篇
  2008年   41821篇
  2007年   44821篇
  2006年   44304篇
  2005年   43285篇
  2004年   41609篇
  2003年   39611篇
  2002年   38408篇
  2001年   56537篇
  2000年   57406篇
  1999年   48662篇
  1998年   14182篇
  1997年   12870篇
  1996年   13207篇
  1995年   12449篇
  1994年   11539篇
  1993年   10816篇
  1992年   38534篇
  1991年   37955篇
  1990年   36697篇
  1989年   35485篇
  1988年   32941篇
  1987年   32242篇
  1986年   30737篇
  1985年   29017篇
  1984年   22206篇
  1983年   19474篇
  1982年   11690篇
  1979年   21114篇
  1978年   15598篇
  1977年   12958篇
  1976年   11955篇
  1975年   12906篇
  1974年   15684篇
  1973年   15450篇
  1972年   14583篇
  1971年   13610篇
  1970年   12836篇
  1969年   12104篇
  1968年   11257篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
991.
Despite the progress achieved in the treatment of ocular diseases, removal of the eyeball still has to be resorted to rather often. The records of 12 hospitals of Moscow over a year evidence 678 enucleations and eviscerations, 248 (39 percent) of these for oncologic diseases, 189 (29.1 percent) because of injury aftereffects, 153 (24 percent) because of glaucoma, and 58 (8 percent) because of ocular inflammations. Common enucleation was carried out in 203 of +/- 400 patients (except oncologic ones) and enucleation with implantation of biological and synthetic drafts in 197 cases, i.e. in half of the patients who needed it; this is explained by the absence of the necessary implants in hospitals. A bank of grafts should be created for centralized provision of ocular hospitals.  相似文献   
992.
Immunogold localisation of laminin in normal and exfoliative iris.   总被引:1,自引:1,他引:0       下载免费PDF全文
Immunoelectron microscopic studies of exfoliative iris tissue (seven specimens) revealed the presence of laminin in the fibrillar component of exfoliation material. The immunogold label was uniformly distributed on the exfoliation fibres. Deposition of laminin labelled exfoliation material in the dilator muscle was a noteworthy feature, as was an apparent depletion of laminin in the basement membranes of ostensibly unaffected vessels. In control iris tissue (five enucleated eyes) laminin was identified in the basement membrane round vascular contractile cells, but not beneath the endothelium.  相似文献   
993.
994.
995.
In the experiment on dogs and in patients with duodenal ulcer disease, it was established that the regulation of acid production besides the vagal nerves was mediated by the intragastric gastrin transport with the blood flow. A method of preoperative diagnosis of the intensity of intragastric blood flow permitting to define more accurately the indications for the choice of a method for surgical treatment has been developed. Supplementation of the selective proximal vagotomy with circular mucosectomy at the boundary between the antrum and body of a stomach enhances the effectiveness of operation due to reduction of the antral gastrin influence on the acid-producing zones of the stomach.  相似文献   
996.
In the article is presented classification, which takes into consideration mechanisms and sequence of spinal segment destruction in case of compression-flexion violence. On the basis of experimental and clinical data are shown the stages of destruction and their roentgenologic diagnosis, prognostication of some other damages, which are not detected by common methods. Differentiated curative tactics, taking account of necessary restorative measures in correspondence with stages and resolution types, is given.  相似文献   
997.
Argon laser pretreatment in Nd: YAG iridotomy   总被引:1,自引:0,他引:1  
Argon laser pretreatment prior to Nd:YAG laser iridotomy may decrease the incidence of operative hemorrhage. In a prospective, randomized clinical trial involving 12 patients (24 eyes), one eye was randomly assigned treatment with the Nd:YAG laser alone, while the other eye was pretreated with argon laser photocoagulation immediately prior to Nd:YAG laser. Eight of the 12 eyes (67%) treated with Nd:YAG laser alone had operative hemorrhages; only 2 of the 12 (17%) pretreated eyes did. Thus, argon laser pretreatment significantly reduced the incidence of hemorrhage during Nd:YAG iridotomy (P = .012).  相似文献   
998.
999.
1000.
Assay of FK 506 in plasma.   总被引:1,自引:0,他引:1  
  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