全文获取类型
收费全文 | 12316篇 |
免费 | 1198篇 |
国内免费 | 17篇 |
专业分类
耳鼻咽喉 | 126篇 |
儿科学 | 316篇 |
妇产科学 | 402篇 |
基础医学 | 1947篇 |
口腔科学 | 218篇 |
临床医学 | 1044篇 |
内科学 | 2480篇 |
皮肤病学 | 530篇 |
神经病学 | 1233篇 |
特种医学 | 420篇 |
外科学 | 1615篇 |
综合类 | 77篇 |
一般理论 | 5篇 |
预防医学 | 1226篇 |
眼科学 | 134篇 |
药学 | 974篇 |
中国医学 | 38篇 |
肿瘤学 | 746篇 |
出版年
2023年 | 118篇 |
2022年 | 101篇 |
2021年 | 198篇 |
2020年 | 180篇 |
2019年 | 234篇 |
2018年 | 280篇 |
2017年 | 268篇 |
2016年 | 273篇 |
2015年 | 315篇 |
2014年 | 329篇 |
2013年 | 634篇 |
2012年 | 667篇 |
2011年 | 632篇 |
2010年 | 406篇 |
2009年 | 338篇 |
2008年 | 544篇 |
2007年 | 487篇 |
2006年 | 554篇 |
2005年 | 505篇 |
2004年 | 537篇 |
2003年 | 446篇 |
2002年 | 403篇 |
2001年 | 334篇 |
2000年 | 337篇 |
1999年 | 310篇 |
1998年 | 148篇 |
1997年 | 105篇 |
1996年 | 122篇 |
1995年 | 132篇 |
1994年 | 104篇 |
1993年 | 90篇 |
1992年 | 222篇 |
1991年 | 233篇 |
1990年 | 206篇 |
1989年 | 232篇 |
1988年 | 214篇 |
1987年 | 200篇 |
1986年 | 183篇 |
1985年 | 184篇 |
1984年 | 162篇 |
1983年 | 115篇 |
1982年 | 103篇 |
1981年 | 77篇 |
1979年 | 115篇 |
1978年 | 85篇 |
1977年 | 90篇 |
1976年 | 72篇 |
1974年 | 75篇 |
1973年 | 72篇 |
1954年 | 88篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
5.
The activity of a rheumatic disease can be influenced by pregnancy and puerperium. Prospective studies have shown an improvement in joint involvement in rheumatoid arthritis in two thirds to three quarters of pregnancies. After birth, an exacerbation is common. In spondylarthropathies there is no relevant change in disease activity. The fetal outcome is not impaired in patients with rheumatoid arthritis and inflammatory spondylarthropathies. Every pregnancy in women with a rheumatic disease should be considered as high-risk, and such pregnancies require close collaboration between rheumatologists and obstetricians. 相似文献
6.
J R Andersen G Lose M N?rgaard H Stimpel J T Andersen 《British journal of urology》1988,61(4):310-313
In a randomised, double-blind study, 20 women with idiopathic detrusor instability and associated symptoms were treated with terodiline 25 mg bd, placebo, and emepronium bromide 200 mg tds--each drug being given for 3 weeks with placebo as wash-out period before cross-over. The results were evaluated according to drug preference, frequency charts and elimination of detrusor instability on cystometry. Serum levels of both drugs were monitored as control of tablet intake. The preference for terodiline to placebo was statistically significant: 14/3 women (P less than 0.05), and the majority of women (12/4) preferred terodiline to emepronium. Terodiline also gave a small but significant reduction in 24 h micturition frequency and eliminated detrusor instability in almost 50% of the patients (P less than 0.05). Side effects were frequent but mild in all three treatment periods. It was concluded that terodiline offers an alternative in the treatment of female detrusor instability. 相似文献
7.
8.
Two cases are presented in which the cause of small-bowel obstruction was enterolith originating in jejunal diverticula. 相似文献
9.
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
10.
Fixation of displaced femoral neck fractures: A comparison between sliding screw plate and four cancellous bone screws 总被引:1,自引:0,他引:1
Frank Madsen Frank Linde Erik Andersen Hanne Birke Inge Hvass Torben D. Poulsen 《Acta orthopaedica》1987,58(3):212-216
In a prospective, randomized trial, 104 consecutive patients with displaced femoral neck fractures were allocated either to fixation with a sliding screw plate or 4 ASIF cancellous bone screws. The patients were reexamined at fixed intervals to determine the time of union. The 2-year-cumulated rate of union was 64 per cent in the plate group and 84 per cent in the screw group. 相似文献