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   2352740篇
  免费   171347篇
  国内免费   3342篇
耳鼻咽喉   32096篇
儿科学   75979篇
妇产科学   62727篇
基础医学   348552篇
口腔科学   63696篇
临床医学   211480篇
内科学   457660篇
皮肤病学   51771篇
神经病学   185484篇
特种医学   88180篇
外国民族医学   489篇
外科学   354171篇
综合类   47547篇
现状与发展   12篇
一般理论   848篇
预防医学   183010篇
眼科学   54374篇
药学   175345篇
  11篇
中国医学   4580篇
肿瘤学   129417篇
  2021年   19031篇
  2019年   19588篇
  2018年   27116篇
  2017年   20416篇
  2016年   22816篇
  2015年   25704篇
  2014年   36191篇
  2013年   54064篇
  2012年   74881篇
  2011年   79588篇
  2010年   47151篇
  2009年   44646篇
  2008年   74767篇
  2007年   79623篇
  2006年   80451篇
  2005年   77920篇
  2004年   74487篇
  2003年   71796篇
  2002年   69457篇
  2001年   108766篇
  2000年   111487篇
  1999年   93532篇
  1998年   27002篇
  1997年   23664篇
  1996年   24065篇
  1995年   22722篇
  1994年   20901篇
  1993年   19726篇
  1992年   72024篇
  1991年   70091篇
  1990年   68419篇
  1989年   65692篇
  1988年   60320篇
  1987年   59146篇
  1986年   55232篇
  1985年   53012篇
  1984年   39327篇
  1983年   33408篇
  1982年   19866篇
  1979年   35888篇
  1978年   25659篇
  1977年   21238篇
  1976年   20337篇
  1975年   21825篇
  1974年   26159篇
  1973年   24816篇
  1972年   23210篇
  1971年   22049篇
  1970年   20259篇
  1969年   19321篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
Three cases of voluntary posterior instability of the shoulder are presented. They have all responded well to a program of electromyographic monitored biofeedback. This method offers a means of enhancing the results of nonoperative treatment.  相似文献   
942.
In acute experiments on anesthetized cats with total ischemia of the brain (15-minute arrest of blood autoperfusion of the cerebral vessels by a stable blood volume) it was shown that euphylline and no-shpa administered before ischemia or in the early period after ischemia inhibit or prevent the development of the postischemic phenomenon of non-recovery of the cerebral blood flow. The two drugs contributed to survival of albino rats following the brain ischemia produced by ligation of both carotid arteries.  相似文献   
943.
The dissociation of visuospatial neglect and neglect dyslexia.   总被引:5,自引:3,他引:2       下载免费PDF全文
A right-handed man with a left hemisphere lesion extending into the right hemisphere, with evidence of both a left-sided neglect dyslexia and right-sided visuospatial neglect is reported. When copying simple geometric designs he omitted to copy figures on the right-hand side of the page, when bisecting lines he tended to bisect the line to the left of the line's actual centre. He had a neglect dyslexia which was characterised by paralexic errors affecting the beginning (that is, left) of words. The occurrence of these two phenomena provides evidence of a dissociation of these forms of neglect. The findings are discussed in relation to the possible mechanisms of unilateral neglect.  相似文献   
944.
The trigone sensitivity test, a complementary test to cystometry, has been proposed as a method for distinguishing certain clinical disorders. Pressure is applied to the trigone region of the bladder by pulling upon a Foley catheter with the balloon inflated and the amount of force needed to induce an urge to void is recorded. Although the trigone sensitivity test has been proposed as a test of exteroceptive function, it is possible that deeper receptors, perhaps proprioceptors, are actually responsible for the awareness of the urge to void during the study. The present investigation compared the trigone sensitivity test with provoked detrusor contraction in 107 patients. The findings indicate that variations in the two responses occur independently of each other. It is concluded that different neural pathways are responsible for the two functions. The hypothesis that exteroceptive and not proprioceptive nerves are being measured during trigone sensitivity testing is supported by these findings.  相似文献   
945.
Reported in this paper are postoperative results recorded from 120 patients, 3 years after selective proximal vagotomy for uncomplicated duodenal ulcer. There was no intraoperative lethality and no recurrence in 96.7 per cent of all cases, while Visick grades I on II were recorded from 98.2 per cent. Radiologically and gastroscopically detected pathological processes receded soon. Average postoperative reduction in acid secretion was 66.2 per cent in BAO and 46.8 per cent in MAO. Acid values re-increased thereafter, and three years later reduction rates still amounted to 43.7 per cent in BAO and 28.6 per cent in MAO. Indications for proximal gastric vagotomy are discussed in some detail.  相似文献   
946.
947.
948.
A 65-year-old man with spontaneous rupture of the esophagus survived with a direct suture of the esophagus 15 hours after the onset of symptoms. Endoscopic examination of the esophagus was especially of great help in determining the surgical procedure in this patient, and we want to stress the importance of prompt diagnosis and immediate surgery for this disease.  相似文献   
949.
A two-week elective to introduce first- and second-year medical students to primary care internal medicine was developed and evaluated. Course time is divided between conference sessions (25 percent) provided by full-time clinical faculty members and office experience (75 percent) provided by volunteer clinical faculty members (general internists in private practice and in prepaid health plans). Evaluations by the students (n = 58) who took the elective consisted of a questionnaire assessment of the conference session topics, the student's ability to carry out course objectives, and the preceptor's teaching activities. The conference topics were highly rated, with a mean score of 4.1 on a rating scale ranging from 1 (unfavorable) to 5 (favorable). The course objectives and teaching activities were also well rated, with a mean score of 4.1 and 3.9, respectively, on a rating scale ranging from 1 (none) to 5 (outstanding).  相似文献   
950.
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