全文获取类型
收费全文 | 25818篇 |
免费 | 1634篇 |
国内免费 | 187篇 |
专业分类
耳鼻咽喉 | 266篇 |
儿科学 | 546篇 |
妇产科学 | 478篇 |
基础医学 | 3862篇 |
口腔科学 | 267篇 |
临床医学 | 2433篇 |
内科学 | 6401篇 |
皮肤病学 | 384篇 |
神经病学 | 2283篇 |
特种医学 | 1122篇 |
外国民族医学 | 8篇 |
外科学 | 4427篇 |
综合类 | 84篇 |
一般理论 | 6篇 |
预防医学 | 1398篇 |
眼科学 | 223篇 |
药学 | 1467篇 |
中国医学 | 49篇 |
肿瘤学 | 1935篇 |
出版年
2024年 | 13篇 |
2023年 | 155篇 |
2022年 | 252篇 |
2021年 | 676篇 |
2020年 | 399篇 |
2019年 | 641篇 |
2018年 | 754篇 |
2017年 | 510篇 |
2016年 | 600篇 |
2015年 | 751篇 |
2014年 | 1002篇 |
2013年 | 1281篇 |
2012年 | 2036篇 |
2011年 | 1979篇 |
2010年 | 1149篇 |
2009年 | 1170篇 |
2008年 | 1769篇 |
2007年 | 1789篇 |
2006年 | 1741篇 |
2005年 | 1760篇 |
2004年 | 1631篇 |
2003年 | 1532篇 |
2002年 | 1429篇 |
2001年 | 211篇 |
2000年 | 154篇 |
1999年 | 221篇 |
1998年 | 272篇 |
1997年 | 235篇 |
1996年 | 204篇 |
1995年 | 167篇 |
1994年 | 120篇 |
1993年 | 144篇 |
1992年 | 105篇 |
1991年 | 81篇 |
1990年 | 79篇 |
1989年 | 52篇 |
1988年 | 58篇 |
1987年 | 41篇 |
1986年 | 50篇 |
1985年 | 44篇 |
1984年 | 38篇 |
1983年 | 49篇 |
1982年 | 41篇 |
1981年 | 49篇 |
1980年 | 37篇 |
1979年 | 21篇 |
1978年 | 16篇 |
1977年 | 15篇 |
1976年 | 14篇 |
1975年 | 18篇 |
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
31.
32.
33.
F Biard C Philippe G Berrut B Lardy R Slama 《Annales de cardiologie et d'angeiologie》1988,37(9):529-534
The authors present the case of a new case of Kearns-Sayre syndrome, with early manifestations (7 months) and dramatic cardiac course. They document the ultimate and often fatal stage of the cardiac disorders of this syndrome, which was usually related to an asystole due to a total atrio-ventricular block and represented in this case by a ventricular hyperexcitability (ventricular tachycardia--"torsade de pointes"--ventricular fibrillation) occurring on an atrio-ventricular block; only one previous, undocumented case was found in the literature. The literature is reviewed in order to analyze the nature and chronology of the heart disorders in the course of the disease, and stress the screening modalities and therapeutic indications (continuous heart stimulation). 相似文献
34.
We believe that rejuvenation of the shapes and volumes of the face is just as important as "tightening of the skin and muscles". In this way a more complete rejuvenation effect is obtained which is better perceived by others. The SMO technique provides a solution by the use of malleable coral microgranules, which may constitute the first biomaterial of a new generation of plastic and malleable onlays. In this context, a more general volumetric concept of ageing is developed, leading to a modification in our consultation and our treatment. Most importantly, this approach opens a whole new field, that of preventative treatment of facial ageing, which will no doubt be multidisciplinary. 相似文献
35.
Summary Hypertension was induced in uninephrectomized rats by NaCl 0.9% drinking and deoxycorticosterone acetate (DOCA) administration for 6 weeks. Plasma renin activity was markedly reduced but not suppressed. Renal renin concentration and total renal renin content were moderately reduced. Intravenous injection of 0.2 ml of antiangiotensin plasma resulted in transitory hypotension both in salt and DOCA-treated rats, and in normotensive control rats. It is concluded that angiotensin participates in the maintenance of blood pressure in salthypertensive rats as well as in normal animals.This work was supported by grant 67-00-517 from D.G.R.S.T. (Délégation Générale à la Recherche Scientifique et Technique). The authors wish to thank Miss colette Innocenzi and Miss Sonia Culot for technical assistance. 相似文献
36.
37.
Association between hormonal changes at menopause and the risk of a coronary event: a longitudinal study 总被引:1,自引:0,他引:1
OBJECTIVE: To investigate the association of hormone levels at menopause, lifestyle variables, and body composition with the predicted 10-year risk of a coronary event, calculated using the PROCAM scoring system, in a population-based sample of Australian-born, middle-aged women. DESIGN: A 9-year prospective study of 438 Australian-born women, who at baseline were aged 45 to 55 years and had menstruated in the prior 3 months. Interviews, fasting blood, and physical measurements were taken annually. The risk of an acute coronary event was calculated using the PROCAM scoring system (includes: age, low-density lipoprotein cholesterol, smoking, high-density lipoprotein cholesterol, systolic blood pressure, family history of premature myocardial infarction, diabetes mellitus, and triglycerides). RESULTS: Retention rate after 8 years of follow-up was 88% (n = 387). In women not using hormone therapy (HT): higher than average body mass index (BMI) (P < 0.001), BMI that increased (P < 0.005), lower than average estradiol levels (P < 0.005), estradiol levels that decreased (P < 0.001), and high free testosterone levels (P < 0.05) were associated with increased risk of a coronary event. There was a trend for high exercise frequency to be associated with a decreased risk (P < 0.07). After BMI and lifestyle variables were taken into account, use of HT did not have a significant effect on risk of a coronary event. CONCLUSION: In this longitudinal observational study of middle-aged Australian-born women, high BMI, an increase in BMI, high free testosterone, low estradiol, and a decrease in estradiol levels were the main determinants of increased risk of an acute coronary event, based on the PROCAM scoring system calculation. More frequent exercise tended to lower the risk. 相似文献
38.
39.
Sylvestre Marchaux Paul Fornes Stphanie Petit Catherine Poisson Didier Thevenin Thierry Le Tourneau Philippe Asseman Patrick Bruneval Pierre-Vladimir Ennezat 《Cardiovascular pathology》2008,17(4):241-243
Myocardial dysfunction without coronary involvement may occur in acute cerebral diseases. The inverted Takotsubo pattern has been recently recognized as a novel heart neurologic stress-related syndrome. We report on the case of a 40-year-old woman presenting with massive subarachnoid hemorrhage and brain death. Echocardiography revealed an extensive left ventricular circumferential akinesis except at the apex. Histologic analysis of the heart confirmed the absence of myocardial infarction and revealed only sparse foci of myocyte necrosis with contraction bands in the akinetic areas. 相似文献
40.