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   2590004篇
  免费   185307篇
  国内免费   7557篇
耳鼻咽喉   34345篇
儿科学   85296篇
妇产科学   71568篇
基础医学   363721篇
口腔科学   69737篇
临床医学   234835篇
内科学   516235篇
皮肤病学   62503篇
神经病学   213806篇
特种医学   99931篇
外国民族医学   736篇
外科学   386553篇
综合类   50403篇
现状与发展   5篇
一般理论   968篇
预防医学   196307篇
眼科学   56746篇
药学   188206篇
  57篇
中国医学   5336篇
肿瘤学   145574篇
  2021年   20438篇
  2019年   20634篇
  2018年   29293篇
  2017年   22593篇
  2016年   26237篇
  2015年   29517篇
  2014年   40454篇
  2013年   60419篇
  2012年   80220篇
  2011年   84488篇
  2010年   50999篇
  2009年   49142篇
  2008年   79023篇
  2007年   83833篇
  2006年   85563篇
  2005年   81727篇
  2004年   78723篇
  2003年   76041篇
  2002年   73330篇
  2001年   128410篇
  2000年   131332篇
  1999年   110501篇
  1998年   31252篇
  1997年   27924篇
  1996年   28218篇
  1995年   27384篇
  1994年   25068篇
  1993年   23423篇
  1992年   85159篇
  1991年   81567篇
  1990年   78785篇
  1989年   76064篇
  1988年   69469篇
  1987年   67997篇
  1986年   63544篇
  1985年   60513篇
  1984年   44940篇
  1983年   37943篇
  1982年   22456篇
  1981年   19984篇
  1979年   38959篇
  1978年   27439篇
  1977年   23252篇
  1976年   21495篇
  1975年   22813篇
  1974年   26786篇
  1973年   25370篇
  1972年   23749篇
  1971年   21955篇
  1970年   20183篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
951.
952.
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   
953.
954.
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   
955.
956.
957.
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   
958.
Dawn and dusk simulation as a therapeutic intervention   总被引:1,自引:0,他引:1  
  相似文献   
959.
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   
960.
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