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   2588113篇
  免费   185151篇
  国内免费   7569篇
耳鼻咽喉   34281篇
儿科学   85221篇
妇产科学   71580篇
基础医学   363699篇
口腔科学   69669篇
临床医学   234615篇
内科学   515607篇
皮肤病学   62481篇
神经病学   213585篇
特种医学   99890篇
外国民族医学   736篇
外科学   386585篇
综合类   50395篇
现状与发展   5篇
一般理论   968篇
预防医学   196183篇
眼科学   56671篇
药学   188035篇
  8篇
中国医学   5331篇
肿瘤学   145288篇
  2021年   19987篇
  2019年   20630篇
  2018年   29291篇
  2017年   22600篇
  2016年   26239篇
  2015年   29516篇
  2014年   40455篇
  2013年   60442篇
  2012年   80250篇
  2011年   84527篇
  2010年   51020篇
  2009年   49159篇
  2008年   79067篇
  2007年   83872篇
  2006年   85602篇
  2005年   81758篇
  2004年   78748篇
  2003年   76084篇
  2002年   73352篇
  2001年   128430篇
  2000年   131366篇
  1999年   110517篇
  1998年   31263篇
  1997年   27932篇
  1996年   28220篇
  1995年   27388篇
  1994年   25067篇
  1993年   23424篇
  1992年   85168篇
  1991年   81571篇
  1990年   78790篇
  1989年   76073篇
  1988年   69475篇
  1987年   68003篇
  1986年   63549篇
  1985年   60519篇
  1984年   44946篇
  1983年   37951篇
  1982年   22462篇
  1981年   19986篇
  1979年   38971篇
  1978年   27441篇
  1977年   23262篇
  1976年   21501篇
  1975年   22821篇
  1974年   26792篇
  1973年   25373篇
  1972年   23754篇
  1971年   21959篇
  1970年   20186篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
971.
972.
Thirty-four epileptic patients, aged 9 to 36, were submitted to A/EEG between May 1987 and July 1988. All patients had a thorough clinical and EEG work-up including long-term conventional EEG, afternoon polygraphic sleep recording and, in some cases, full-night EEG and video monitoring. Patients were divided into 2 groups: group I included 19 patients (18 with symptomatic partial epilepsy (SPE) and 1 with idiopathic generalized epilepsy (IGE) in whom no seizure had ever been recorded in spite of EEG recordings averaging a total of 16 hrs 10 min, awake and asleep); group II included 15 subjects (6 with SPE, 5 with IGE, 3 with symptomatic GE and 1 with undetermined epilepsy) in whom one or several seizures had been recorded. A/EEG was performed in order to: 1) obtain better clinical and EEG characterization of seizures, 2) study the circadian distribution of seizures, 3) verify the efficacy of drug treatment and, 4) establish the epileptic or non-epileptic nature of some ictal events. The results of A/EEG were considered positive in 52.63% of group I patients and in 93.33% of group II patients. The authors discuss the specific advantages of A/EEG vs conventional EEG: recording of seizures with random occurrence, of seizures accompanied by falls, checking the remission of seizures.  相似文献   
973.
974.
The authors describe a case of retrobulbar optic neuropathy in a patient with type 1 Diabetes mellitus. In spite of good metabolic control, there has been a slow but progressive functional visual decline. Worthy of note is the abnormal precocity of the appearance of the functional damage of the optic nerve compared to the involvement of the peripheral system.  相似文献   
975.
976.
977.
S Bilancini  M Lucchi 《Phlébologie》1989,42(1):151-156
The subject of enlarged legs is vast and complex. Up to now there has been no organic classification of the clinical picture involved. The basic problem is that of the criterion on which to base the classification. Literature on this subject has opted for the pathogenic criterion because it seems to facilitate the formulation of a classification which is of use to the doctor. One possibility would be to divide the syndrome into vascular and non-vascular swollen legs. The first group could in turn be separated into macro-circulating and micro-circulatory. The micro-circulatory forms can be primitive or secondary. Amongst the secondary micro-circulatory forms, two other groups can be singled out: secondary forms with local cause and secondary forms caused by organic pathology. However, there are clinical forms which are on the periphery of these different groups and these forms are subject to discussion regarding nosographic localization.  相似文献   
978.
Dawn and dusk simulation as a therapeutic intervention   总被引:1,自引:0,他引:1  
  相似文献   
979.
Three different sensory loss tests, for anaesthesia to light touch, for diminished pain sensation and for loss of thermosensation, were compared with histopathological examination results in the diagnosis of suspected tuberculoid leprosy in 120 individuals with 126 lesions. Though none of the 3 tests used in this study was found to be strikingly superior to any of the others, the results indicate potentially important differences in their usefulness in different subgroups of suspected patients. The methodological problems inherent in such studies are discussed.  相似文献   
980.
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