全文获取类型
收费全文 | 1250篇 |
免费 | 65篇 |
国内免费 | 13篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 53篇 |
妇产科学 | 31篇 |
基础医学 | 157篇 |
口腔科学 | 44篇 |
临床医学 | 90篇 |
内科学 | 330篇 |
皮肤病学 | 33篇 |
神经病学 | 65篇 |
特种医学 | 154篇 |
外科学 | 107篇 |
综合类 | 13篇 |
预防医学 | 111篇 |
眼科学 | 6篇 |
药学 | 98篇 |
中国医学 | 2篇 |
肿瘤学 | 28篇 |
出版年
2024年 | 2篇 |
2023年 | 9篇 |
2022年 | 22篇 |
2021年 | 26篇 |
2020年 | 20篇 |
2019年 | 24篇 |
2018年 | 35篇 |
2017年 | 23篇 |
2016年 | 29篇 |
2015年 | 31篇 |
2014年 | 48篇 |
2013年 | 45篇 |
2012年 | 61篇 |
2011年 | 81篇 |
2010年 | 58篇 |
2009年 | 57篇 |
2008年 | 65篇 |
2007年 | 59篇 |
2006年 | 49篇 |
2005年 | 38篇 |
2004年 | 39篇 |
2003年 | 35篇 |
2002年 | 19篇 |
2001年 | 16篇 |
2000年 | 18篇 |
1999年 | 23篇 |
1998年 | 33篇 |
1997年 | 41篇 |
1996年 | 52篇 |
1995年 | 30篇 |
1994年 | 25篇 |
1993年 | 35篇 |
1992年 | 6篇 |
1991年 | 4篇 |
1990年 | 12篇 |
1989年 | 11篇 |
1988年 | 13篇 |
1987年 | 21篇 |
1986年 | 22篇 |
1985年 | 12篇 |
1984年 | 10篇 |
1983年 | 6篇 |
1982年 | 20篇 |
1981年 | 6篇 |
1980年 | 6篇 |
1977年 | 11篇 |
1976年 | 7篇 |
1975年 | 9篇 |
1971年 | 1篇 |
1968年 | 1篇 |
排序方式: 共有1328条查询结果,搜索用时 15 毫秒
1.
D Gröne† R Treudler† EM de Villiers‡ R Husak† CE Orfanos† ChC Zouboulis†§ 《Journal of the European Academy of Dermatology and Venereology》2006,20(2):202-205
Cidofovir is an acyclic nucleoside phosphonate with broad-spectrum activity against DNA viruses, including human papilloma virus (HPV). However, data on the efficacy of cidofovir in an immunosuppressive setting remain contradictory. We report for the first time on the promotion of the healing of recalcitrant warts in a patient with myelodysplastic syndrome with intravenous cidofovir treatment. 相似文献
2.
Alcohol use among Hispanic groups in the United States 总被引:3,自引:0,他引:3
R Caetano 《The American journal of drug and alcohol abuse》1988,14(3):293-308
3.
4.
R Caetano 《Journal of studies on alcohol》1987,48(2):153-160
Survey respondents' views about alcoholism as an illness, support for treatment, treatment recommendation and stigma surrounding alcoholics are examined. Subjects (N = 482) comprise a random sample of the population of Contra Costa County, California. About 91% of the respondents agree with the notion that alcoholism is an illness, but 40% also agree that alcoholics drink because they want to. More women than men support the idea that to recover alcoholics will have to quit drinking forever. The contrary is true of the idea of controlled drinking. Education and income are negatively associated with items on loss of control and controlled drinking. Respondents who have had their lives deeply affected by an alcoholic and those who report a drinking problem of their own do not differ in their opinions about alcoholism from those who do not have these characteristics. Alcoholics Anonymous is the most common form of treatment recommended by the respondents. In general, results show considerable support for treatment as well as ambivalence regarding the disease concept. 相似文献
5.
6.
7.
Nuno Fonseca Filomena Caetano José Santos Filipe Seixo Leonel Bernardino Isabel Silvestre Paula Cardoso Filomena Segurado Lopes Inês 《Revista portuguesa de cardiologia》2004,23(3):365-375
INTRODUCTION: In patients (pts) with atrial fibrillation (AF) of more than 48 hours' duration, electrical cardioversion (ECV) should only be performed after 3 weeks of effective anticoagulation. Transesophageal echocardiography (TEE) allows earlier ECV; however, despite exclusion of thrombi in the atrium and left atrial appendage (LAA), cases of thromboembolism related to ECV have been documented in AF. To define a low-risk group for cardioversion without previous anticoagulation, pts were selected for immediate ECV if no thrombi or dynamic spontaneous echo contrast (auto-contrast) were found after TEE and if LAA velocity was more than 0.25 m/sec. METHODS AND RESULTS: We performed TEE in 31 consecutive pts referred for ECV for AF of more than 48 hours' duration and without previous anticoagulation. After TEE the pts eligible for immediate ECV began anticoagulation with low molecular weight heparin (enoxaparin), subcutaneously in therapeutic doses, together with warfarin immediately before cardioversion. Enoxaparin was continued until an INR of over 2 was reached. Based on the TEE findings, the pts were divided in 2 groups: immediate ECV, group A, 20 pts with a mean age of 62 +/- 13 years, 6 female; and conventional therapy with warfarin before ECV, group B, 11 pts, mean age of 67 +/- 10 years (p < 0.05), 2 female. None of the pts in either group had mitral stenosis or previous episodes of thromboembolism. The mean transverse diameter of the left atrium in the 31 pts was 47 +/- 4.5 mm, without statistically significant differences between the 2 groups. Of the 11 pts in group B, 3 had a thrombus in the LAA, 6 dynamic spontaneous echo contrast and the remainder LAA velocities of less than 0.25 m/sec. ECV was achieved in all the pts, with no complications. Oral anticoagulation was maintained for at least a month. At one month, sinus rhythm was maintained in 75% of group A and 45% of group B (p < 0.01). CONCLUSION: In pts with AF of more than 48 hours' duration and no previous history of thromboembolism, the use of our exclusion criteria during TEE enabled stratification of a low-risk population for immediate ECV, which was accomplished effectively and safely in 2/3 of the pts. This strategy is associated with early symptomatic improvement, and may contribute to maintenance of sinus rhythm after one month, which was significantly better than in the pts who had prolonged therapy with warfarin before ECV, despite the differences found in age and left ventricular function. 相似文献
8.
Digital radiography of subtle pulmonary abnormalities: an ROC study of the effect of pixel size on observer performance 总被引:3,自引:0,他引:3
Forty conventional radiographs with examples of mild interstitial infiltrates and subtle pneumothoraces and 40 normal studies of the chest were selected and digitized, with pixel sizes of 1.0, 0.5, 0.2, and 0.1 mm. Observer performance tests were carried out using receiver operating characteristic analysis. Conventional radiographs and digitized images were compared. The results indicate that, in such cases, diagnostic accuracy increases significantly as the pixel size is reduced, at least to the 0.1-mm level. We conclude that, for digital systems using screen-film or similar image receptors, use of a pixel size substantially larger than 0.1 mm may result in some loss of diagnostic accuracy. 相似文献
9.
10.