全文获取类型
收费全文 | 314870篇 |
免费 | 12282篇 |
国内免费 | 880篇 |
专业分类
耳鼻咽喉 | 4361篇 |
儿科学 | 10621篇 |
妇产科学 | 7884篇 |
基础医学 | 40574篇 |
口腔科学 | 8080篇 |
临床医学 | 27341篇 |
内科学 | 60405篇 |
皮肤病学 | 6376篇 |
神经病学 | 23240篇 |
特种医学 | 14746篇 |
外国民族医学 | 101篇 |
外科学 | 46651篇 |
综合类 | 2951篇 |
现状与发展 | 1篇 |
一般理论 | 168篇 |
预防医学 | 27094篇 |
眼科学 | 7154篇 |
药学 | 21953篇 |
4篇 | |
中国医学 | 311篇 |
肿瘤学 | 18016篇 |
出版年
2021年 | 2134篇 |
2019年 | 2060篇 |
2018年 | 5723篇 |
2017年 | 5564篇 |
2016年 | 5019篇 |
2015年 | 7115篇 |
2014年 | 7541篇 |
2013年 | 8527篇 |
2012年 | 17263篇 |
2011年 | 12714篇 |
2010年 | 6711篇 |
2009年 | 8202篇 |
2008年 | 9815篇 |
2007年 | 11070篇 |
2006年 | 11173篇 |
2005年 | 19395篇 |
2004年 | 20472篇 |
2003年 | 15936篇 |
2002年 | 10836篇 |
2001年 | 5473篇 |
2000年 | 2585篇 |
1999年 | 7030篇 |
1998年 | 2197篇 |
1992年 | 7605篇 |
1991年 | 7791篇 |
1990年 | 8002篇 |
1989年 | 7557篇 |
1988年 | 7033篇 |
1987年 | 6768篇 |
1986年 | 6488篇 |
1985年 | 5896篇 |
1984年 | 4416篇 |
1983年 | 3738篇 |
1982年 | 2161篇 |
1981年 | 1816篇 |
1980年 | 1785篇 |
1979年 | 4290篇 |
1978年 | 2935篇 |
1977年 | 2328篇 |
1976年 | 2008篇 |
1975年 | 2881篇 |
1974年 | 3470篇 |
1973年 | 3039篇 |
1972年 | 2974篇 |
1971年 | 2874篇 |
1970年 | 2696篇 |
1969年 | 2583篇 |
1968年 | 2322篇 |
1967年 | 2251篇 |
1966年 | 1982篇 |
排序方式: 共有10000条查询结果,搜索用时 953 毫秒
181.
182.
183.
184.
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
185.
186.
G Fran?ois C Mycinski L F Garnier B Charbonnier M Marchand L Guillou M Brochier 《Archives des maladies du coeur et des vaisseaux》1987,80(3):367-370
The authors report a case of massive haemolytic anaemia with acute mitral valve regurgitation and left cardiac failure, which occurred one year after surgical reconstruction of the mitral valve for rupture of smaller leaflet chordae. Anaemia, mitral regurgitation and cardiac failure disappeared after mitral valve replacement, using a Carpentier Edwards No. 29 valve. Haemolytic anaemia following mitral valve reconstruction is exceptional. It seems to be due to the suture material lying in a turbulent regurgitation stream when mitral incompetence develops again. 相似文献
187.
C. Sch?fer H. H. Klünemann B. Ibach J. Mueller A. Putzhammer I. Trender-Gerhard G. Schuierer H. E. Klein 《Der Nervenarzt》2002,24(1):879-882
Wir berichten über den ersten Fall von polyzystischer lipomembran?ser Osteodysplasie oder “brain, bone and fat disease” in
Deutschland. Die nach dem Erstbeschreibern auch als Morbus J?rvi-Hakola-Nasu bezeichnete Erkrankung ist bisher vor allem in
Japan und in Finnland beschrieben worden. Einzelne F?lle wurden aus Schweden, Norwegen, Italien, Südafrika, Belgien und den
USA berichtet. Im deutschsprachigen Raum ist bisher ein Fall aus ? ver?ffentlicht worden. 相似文献
188.
Patients at Boston's Children's Hospital diagnosed as having cerebral palsy were filmed walking. These films were digitized and translated into measurements associated with leg motion. In this paper we use the gait measurements of 128 such patients to illustrate that the kth nearest neighbour clustering procedure results in a gait typology for patients with cerebral palsy. The procedure identifies four subpopulations from the sample data; the membership of a patient within this typology is mostly determined by the patient's motor control. The developed typology differs from the present diagnostic system which classifies a cerebral palsy patient as either quadriplegic, diaplegic or hemiplegic. 相似文献
189.
Joseph M. Becker M.D. Peter H. Arger Alan J. Wein A. Richard Kendall 《Urologic radiology》1983,5(1):127-129
A 35-year-old man discovered a 1-cm nodule at the upper pole of the left testicle after blunt focal trauma. While the pain, tenderness, and location suggested hematoma or appendiceal torsion, the demonstration by ultrasound of the size, cystic nature, and extraparenchymal location was consistent with the rarely documented cyst of the tunica albuginea. 相似文献
190.
P Rubin S Holm L Friberg P Videbech H S Andersen B B Bendsen N Str?ms? J K Larsen N A Lassen R Hemmingsen 《Archives of general psychiatry》1991,48(11):987-995
To measure prefrontal and subcortical activity during a cognitive task, we examined 19 newly diagnosed schizophrenics and patients with schizophreniform psychosis. Seven healthy volunteers served as controls. The patients were drug naive or had received neuroleptics for a few days only. Cerebral blood flow distribution was depicted by single photon emission computed tomography at rest and during activation with the Wisconsin Card Sorting Test. A significant relative activation deficit in the left inferior-prefrontal region was revealed during the Wisconsin Card Sorting Test in the patient group. Furthermore, the patients had impaired striatal suppression on the left side during the cognitive task. The test performance was significantly impaired in the patients. The inability to reduce striatal activity may be due to a lack of corticostriatal feedback during prefrontal activation. 相似文献