全文获取类型
收费全文 | 2588113篇 |
免费 | 185151篇 |
国内免费 | 7569篇 |
专业分类
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 |
出版年
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.
M M Pedrotti A L Basso 《Metabolic, pediatric, and systemic ophthalmology (New York, N.Y. : 1985)》1986,9(2-4):94-97
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.
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
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.