全文获取类型
收费全文 | 4750篇 |
免费 | 429篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 43篇 |
儿科学 | 118篇 |
妇产科学 | 77篇 |
基础医学 | 705篇 |
口腔科学 | 88篇 |
临床医学 | 471篇 |
内科学 | 863篇 |
皮肤病学 | 466篇 |
神经病学 | 363篇 |
特种医学 | 127篇 |
外科学 | 590篇 |
综合类 | 26篇 |
一般理论 | 2篇 |
预防医学 | 403篇 |
眼科学 | 48篇 |
药学 | 337篇 |
中国医学 | 8篇 |
肿瘤学 | 463篇 |
出版年
2023年 | 44篇 |
2022年 | 54篇 |
2021年 | 111篇 |
2020年 | 94篇 |
2019年 | 139篇 |
2018年 | 148篇 |
2017年 | 114篇 |
2016年 | 142篇 |
2015年 | 129篇 |
2014年 | 191篇 |
2013年 | 252篇 |
2012年 | 311篇 |
2011年 | 344篇 |
2010年 | 174篇 |
2009年 | 160篇 |
2008年 | 259篇 |
2007年 | 246篇 |
2006年 | 248篇 |
2005年 | 209篇 |
2004年 | 204篇 |
2003年 | 195篇 |
2002年 | 164篇 |
2001年 | 89篇 |
2000年 | 88篇 |
1999年 | 101篇 |
1998年 | 49篇 |
1997年 | 44篇 |
1996年 | 27篇 |
1995年 | 27篇 |
1994年 | 29篇 |
1993年 | 25篇 |
1992年 | 50篇 |
1991年 | 55篇 |
1990年 | 53篇 |
1989年 | 70篇 |
1988年 | 56篇 |
1987年 | 47篇 |
1986年 | 35篇 |
1985年 | 37篇 |
1984年 | 35篇 |
1983年 | 31篇 |
1982年 | 26篇 |
1981年 | 17篇 |
1979年 | 26篇 |
1978年 | 24篇 |
1975年 | 21篇 |
1974年 | 27篇 |
1973年 | 22篇 |
1970年 | 16篇 |
1969年 | 16篇 |
排序方式: 共有5198条查询结果,搜索用时 296 毫秒
1.
Arvid Nikolai Kildahl Sissel Berge Helverschou Trine Lise Bakken Hanne Weie Oddli 《Journal of mental health research in intellectual disabilities》2020,13(3):201-230
ABSTRACT
Introduction
Individuals with autism spectrum disorder (ASD) and intellectual disability (ID) seem to be at increased risk for post-traumatic stress disorder (PTSD), but knowledge is sparse regarding its identification in this population. Previous research indicates that certain symptoms of PTSD may be more easily recognized, and that identifying reexperiencing and avoidance is particularly challenging. 相似文献2.
3.
4.
5.
6.
Timothee Dub Bolette Sborg Peter Henrik Andersen Thorolfur Gudnason Hanne Nkleby Ann Lindstrand Rose-Marie Carlsson Hanna Nohynek 《Euro surveillance : bulletin européen sur les maladies transmissibles = European communicable disease bulletin》2021,26(4)
Healthcare workers (HCWs) are at increased risk of both exposure and transmission of infectious disease. Two European Union (EU) directives state that health services are responsible for assessing their employees’ potential exposure to infectious diseases and offering immunisation free of charge. We assessed current policy for immunisation of HCWs and the availability of vaccine coverage data in the Nordic countries by surveying national vaccination experts in Denmark, Finland, Iceland, Norway and Sweden, as well as Swedish county medical officers (CMOs). All national experts and 17 of 21 Swedish CMOs responded. All EU countries had transposed the European directives into national law, while Norway and Iceland had similar national legislation. Recommendations or guidelines were issued in Denmark, Finland, Iceland, Norway and 15 of 17 responding Swedish counties. The range of diseases covered differed by countries and Swedish counties. HCW vaccine coverage data were not systematically collected; incomplete estimates were only available for Finland and two Swedish counties. In conclusion, recommendations or guidelines exist in the Nordic countries, but their impact cannot be assessed, as vaccine uptake among HCWs is not currently measured. Systematic collection of data is a necessary step towards improving HCW immunisation policy and practice in the Nordic countries. 相似文献
7.
Low myocardial glucose uptake in Turner syndrome is unaffected by growth hormone: a randomized,placebo‐controlled FDG‐PET study
下载免费PDF全文
![点击此处可从《Clinical endocrinology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
8.
Hoilund-Carlsen Poul F.; Johansen Allan; Vach Werner; Haghfelt Torben 《European heart journal》2006,27(9):1128-1129
We thank Geluk and Zijlstra for their kind words as well astheir considerations and proposals. The latter hits right intothe heart of the issue: should one stick to the anatomicparadigm urging us to detect and treat coronary stenoses andcalcifications rather than follow 相似文献
9.
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
10.
K Thomsen B J Riis J S Johansen C Christiansen P R?dbro 《Gynecological endocrinology》1987,1(2):169-175
Bone turnover before and after withdrawal of estrogen/gestagen treatment was studied in a randomized trial with 110 healthy female volunteers, who had passed a natural menopause 6 months to 3 years before the start of the study. Urinary excretion of intravenously injected 99m-technetium diphosphonate was measured as an index of bone turnover; plasma bone Gla protein and serum alkaline phosphatase were measured as indices of bone formation; and fasting urinary excretion of hydroxyproline and calcium were measured as estimates of bone resorption. During 2 years of hormone treatment, all variables decreased highly significantly (p less than 0.001) to a constant low level. Three months after withdrawal all variables increased highly significantly (p less than 0.001) towards, but not above, pretreatment and placebo levels. We conclude that withdrawal of estrogen/gestagen replacement therapy in postmenopausal women increases bone turnover, but not in excess of pretreatment values. This indicates that bone loss (after withdrawal) is similar to that seen in the placebo group and that a rebound phenomenon is unlikely. 相似文献