全文获取类型
收费全文 | 150696篇 |
免费 | 31208篇 |
国内免费 | 2399篇 |
专业分类
耳鼻咽喉 | 5251篇 |
儿科学 | 5388篇 |
妇产科学 | 2436篇 |
基础医学 | 2956篇 |
口腔科学 | 1503篇 |
临床医学 | 26597篇 |
内科学 | 47322篇 |
皮肤病学 | 7479篇 |
神经病学 | 14691篇 |
特种医学 | 6380篇 |
外科学 | 41064篇 |
综合类 | 257篇 |
现状与发展 | 72篇 |
预防医学 | 6953篇 |
眼科学 | 3367篇 |
药学 | 875篇 |
中国医学 | 8篇 |
肿瘤学 | 11704篇 |
出版年
2024年 | 686篇 |
2023年 | 4786篇 |
2022年 | 1189篇 |
2021年 | 3073篇 |
2020年 | 6032篇 |
2019年 | 2140篇 |
2018年 | 7372篇 |
2017年 | 7330篇 |
2016年 | 8422篇 |
2015年 | 8411篇 |
2014年 | 15496篇 |
2013年 | 15622篇 |
2012年 | 5466篇 |
2011年 | 5450篇 |
2010年 | 10332篇 |
2009年 | 14231篇 |
2008年 | 5799篇 |
2007年 | 4042篇 |
2006年 | 6473篇 |
2005年 | 3760篇 |
2004年 | 3017篇 |
2003年 | 1977篇 |
2002年 | 2059篇 |
2001年 | 3793篇 |
2000年 | 2999篇 |
1999年 | 3195篇 |
1998年 | 3637篇 |
1997年 | 3455篇 |
1996年 | 3360篇 |
1995年 | 3208篇 |
1994年 | 1936篇 |
1993年 | 1558篇 |
1992年 | 1371篇 |
1991年 | 1402篇 |
1990年 | 1051篇 |
1989年 | 1170篇 |
1988年 | 1010篇 |
1987年 | 846篇 |
1986年 | 882篇 |
1985年 | 711篇 |
1984年 | 548篇 |
1983年 | 517篇 |
1982年 | 513篇 |
1981年 | 399篇 |
1980年 | 360篇 |
1979年 | 306篇 |
1978年 | 328篇 |
1977年 | 396篇 |
1975年 | 277篇 |
1972年 | 303篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
32.
33.
34.
Prostatitis and male infertility are frequent disorders, and the role of prostatitis in male infertility has been under discussion for more than 30 years. Many researchers have shown relevant links between the two. Although a causal relationship has not been definitely demonstrated, increasing evidence shows that chronic prostatitis has a relevant negative impact on male fertility potential, at least in certain subgroups. In the following review, we focus on the present state of knowledge on the role of chronic prostatitis as an etiologic factor in male infertility. 相似文献
35.
36.
INTRODUCTION: The clinical presentation of morphea varies from localized plaques to generalized eruptions. Its cause remains unknown and medical treatments have often proved unsatisfactory. Studies have previously shown that improvement of hypertrophic scars and fibrotic skin can be achieved with the use of a 585 nm pulsed dye laser (PDL). METHODS: A case of plaque-type morphea was treated with 585 nm pulsed dye laser irradiation at an average fluence of 5.0 J/cm2 at bimonthly time intervals. RESULTS: Marked clinical improvement as evidenced by improved pliability and skin coloration was seen after 4 successive PDL treatments. No side effects or complications were encountered. CONCLUSION: Pulsed dye laser therapy is a viable treatment option for morphea. The mechanism of its effect in this condition remains unknown. 相似文献
37.
Angiotensin Converting Enzyme Inhibitors: Animal Experiments Suggest a New Pharmacological Treatment for Alcohol Abuse in Humans 总被引:1,自引:0,他引:1
G. Spinosa MSc E. Perlanski Dipl Tech. F. H. H. Leenen MD R. B. Stewart MSc L. A. Grupp DSc 《Alcoholism, clinical and experimental research》1988,12(1):65-70
The prevalence of heavy alcohol consumption is a major problem of increasing proportions throughout the world. Although alcohol sensitizing drugs and more recently serotonin uptake inhibitors are drug interventions with some following, their long term beneficial consequences have yet to be demonstrated. In recent years, we have demonstrated that manipulating activity in the renin-angiotensin system will dramatically alter voluntary alcohol consumption in rats. Based on these findings, the present study evaluated the ability of a class of drugs known as the angiotensin converting enzyme inhibitors to reduce voluntary alcohol drinking in laboratory animals. These drugs prevent the conversion of angiotensin I to angiotensin II. They have been licensed for use in Europe and North America and are indicated in the treatment of hypertension. Our experiments showed that both captopril (Capoten, Squibb) and enalapril (Vasotec, Merck Sharpe & Dohme) can reduce alcohol drinking in both normotensive and hypertensive animals regardless of whether the pattern of intake is in a bout or of a less exaggerated nature. Furthermore, this change in alcohol intake can occur without concomitant changes in blood pressure, plasma renin activity, overall fluid balance, or the distribution and metabolism of alcohol. Taken together these findings suggest that the angiotensin converting enzyme inhibitors should be evaluated in a clinical setting for they may prove to be a useful new treatment or treatment adjunct for alcohol abuse in humans. 相似文献
38.
39.
40.
Milton G. Mutchnick MD Horchang H. Lee MD 《Alcoholism, clinical and experimental research》1988,12(1):155-158
Concanavalin A-induced lymphocyte proliferation was studied in 25 patients with alcoholic hepatitis or compensated alcoholic cirrhosis. Nine alcoholics without evidence of liver disease were also evaluated. A nonlinear correlation equation, which was natural logarithmic, was applied to individual dose-response proliferation curves and permitted comparisons between patient groups and controls. The proliferative response in all patient groups was significantly lower when compared to healthy controls and was independent of the presence or absence of liver disease. This suggests that some changes in immune function observed in alcoholics may be linked to the direct effects of alcohol on the immune system rather than to the associated liver disease. 相似文献