全文获取类型
收费全文 | 510487篇 |
免费 | 295146篇 |
国内免费 | 51265篇 |
专业分类
耳鼻咽喉 | 4849篇 |
儿科学 | 7438篇 |
妇产科学 | 7462篇 |
基础医学 | 119326篇 |
口腔科学 | 7202篇 |
临床医学 | 92800篇 |
内科学 | 135790篇 |
皮肤病学 | 7786篇 |
神经病学 | 35606篇 |
特种医学 | 17890篇 |
外国民族医学 | 111篇 |
外科学 | 70306篇 |
综合类 | 90129篇 |
现状与发展 | 62篇 |
一般理论 | 53篇 |
预防医学 | 57571篇 |
眼科学 | 23983篇 |
药学 | 83368篇 |
192篇 | |
中国医学 | 57781篇 |
肿瘤学 | 37193篇 |
出版年
2023年 | 5900篇 |
2022年 | 12739篇 |
2021年 | 15853篇 |
2020年 | 15024篇 |
2019年 | 21007篇 |
2018年 | 22100篇 |
2017年 | 21676篇 |
2016年 | 19915篇 |
2015年 | 23509篇 |
2014年 | 26083篇 |
2013年 | 25295篇 |
2012年 | 31628篇 |
2011年 | 34953篇 |
2010年 | 29123篇 |
2009年 | 34306篇 |
2008年 | 25757篇 |
2007年 | 22665篇 |
2006年 | 21790篇 |
2005年 | 21717篇 |
2004年 | 19489篇 |
2003年 | 17955篇 |
2002年 | 17032篇 |
2001年 | 18182篇 |
2000年 | 13799篇 |
1999年 | 19251篇 |
1998年 | 17669篇 |
1997年 | 17563篇 |
1996年 | 17579篇 |
1995年 | 17580篇 |
1994年 | 17016篇 |
1993年 | 14891篇 |
1992年 | 15115篇 |
1991年 | 14093篇 |
1990年 | 12791篇 |
1989年 | 12404篇 |
1988年 | 11747篇 |
1987年 | 11053篇 |
1986年 | 10331篇 |
1985年 | 9234篇 |
1984年 | 7039篇 |
1983年 | 6920篇 |
1982年 | 7812篇 |
1981年 | 7296篇 |
1980年 | 6959篇 |
1979年 | 6853篇 |
1978年 | 5945篇 |
1977年 | 6213篇 |
1976年 | 5830篇 |
1975年 | 5553篇 |
1974年 | 5139篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
Jean-Sébastien Fallu Jürgen Rehm Emmanuel N. Kuntsche Esther Grichting Neerav Monga Edward M. Adlaf Susan J Bondy Gerhard Gmel 《Sozial- und Pr?ventivmedizin》2006,8(1):363-372
Volume and profile of alcohol consumption among students and classmates as predictors of aggression and victimization: a multilevel
analysis among Swiss adolescents
Objective:
To test the effects of the volume of alcohol consumption and drinking patterns on alcohol-related aggression and victimization, both at the individual and class levels. 相似文献32.
33.
Tetsuro Sano Munetaka Masuda Shigeki Morita Hisataka Yasui 《The Japanese Journal of Thoracic and Cardiovascular Surgery》2006,54(4):149-154
OBJECTIVE: It is well documented that cardiopulmonary bypass (CPB) severely impairs cellular immunity. The objective of this study was to investigate the effect of prostaglandin E1 (PGE1) on cellular immunity after CPB. METHODS: Patients who underwent elective cardiac surgery were randomly divided into the PGE1 group (n=12) and the control group (n=12). In the PGE1 group, PGE1 was administered at 20 ng/kg/min from just after the induction of anesthesia to the end of surgery. Peripheral blood mononuclear cells (PBMCs) were taken before anesthesia and on postoperative days 1, 3 and 7 (POD 1, POD 3 and POD 7). Proliferation responses of T cells to phytohemagglutinin (PHA) and pure protein derivative (PPD) antigen were measured as indicators of cellular immunity. RESULTS: PGE1 significantly attenuated the impairment of both PHA and PPD response after cardiac surgery on POD 1 (PHA response, 30 +/- 21% vs. 53 +/- 32%, control vs. PGE, p=0.048; PPD response, 18 +/- 21% vs. 39 +/- 27%, control vs. PGE, p=0.046). The reduced glutathione content of PBMCs in the control group was significantly decreased on POD 1. CONCLUSION: PGE1 attenuated the impairment of cellular immunity after cardiac surgery with CPB by reducing oxidative stress on PBMCs. 相似文献
34.
35.
36.
37.
Shao-Liang Chen Tim-Mo Chen Hsian-Jenn Wang 《Journal of plastic, reconstructive & aesthetic surgery》2006,59(8):846-855
Finding appropriate soft-tissue to cover a wound located over the middle or distal portion of the foot can be challenging. A distally based sural fasciomusculocutaneous flap including the sural nerve and a midline cuff of the gastrocnemius muscle can be used for this purpose. This flap is designed on the proximal third of the posterior calf and is nourished in a retrograde manner by the lower peroneal septocutaneous perforators, through the vascular axis of the sural nerve to the musculocutaneous perforators of the gastrocnemius muscle. Between October of 2002 and January of 2004, this flap was applied in nine individuals, including four diabetic patients. The skin defects all resulted from trauma, osteomyelitis or chronic ulcer, and combined with bone or tendon exposure. One flap developed distal necrosis. The other flaps survived fully and provided good contour. In our series, diabetes mellitus seemed not to compromise the vascularity of the flap. The distally based sural fasciomusculocutaneous flap is very useful for lower limb reconstruction, particularly for the foot, because of its long vascular pedicle and the availability of the skin portion of the proximal calf based on direct branches between the musculocutaneous perforators and the neurovascular axis of the sural nerve. This is an important variant of the sural neurocutaneous flap and it appears to be a good alternative to free flaps for resurfacing the foot. 相似文献
38.
39.
Yasuyuki Suzuki Kazuyuki Daitoku Masahito Minakawa Kozo Fukui Ikuo Fukuda 《The Japanese Journal of Thoracic and Cardiovascular Surgery》2006,54(1):44-46
We report the case of a 4-year-old girl who had quadricuspid aortic valve regurgitation with tetralogy of Fallot and pulmonary
atresia. This combination is very uncommon. Aortic valve replacement was performed successfully due to aortic regurgitation
which had progressed one year after the total repair. The dilated aortic annulus plus quadricuspid aortic valve may result
in progressive aortic regurgitation for a short period. 相似文献
40.