全文获取类型
收费全文 | 1276927篇 |
免费 | 92873篇 |
国内免费 | 1995篇 |
专业分类
耳鼻咽喉 | 18187篇 |
儿科学 | 42268篇 |
妇产科学 | 37813篇 |
基础医学 | 187097篇 |
口腔科学 | 35381篇 |
临床医学 | 108202篇 |
内科学 | 251578篇 |
皮肤病学 | 26500篇 |
神经病学 | 99186篇 |
特种医学 | 50015篇 |
外国民族医学 | 366篇 |
外科学 | 197643篇 |
综合类 | 26524篇 |
现状与发展 | 1篇 |
一般理论 | 300篇 |
预防医学 | 92600篇 |
眼科学 | 29071篇 |
药学 | 97761篇 |
1篇 | |
中国医学 | 2497篇 |
肿瘤学 | 68804篇 |
出版年
2018年 | 11816篇 |
2015年 | 11617篇 |
2014年 | 16005篇 |
2013年 | 24359篇 |
2012年 | 33552篇 |
2011年 | 35952篇 |
2010年 | 21211篇 |
2009年 | 20021篇 |
2008年 | 34990篇 |
2007年 | 37966篇 |
2006年 | 38516篇 |
2005年 | 37808篇 |
2004年 | 36387篇 |
2003年 | 35376篇 |
2002年 | 34927篇 |
2001年 | 58101篇 |
2000年 | 59588篇 |
1999年 | 50690篇 |
1998年 | 14235篇 |
1997年 | 12812篇 |
1996年 | 13079篇 |
1995年 | 12350篇 |
1994年 | 11760篇 |
1993年 | 10869篇 |
1992年 | 40992篇 |
1991年 | 40365篇 |
1990年 | 39890篇 |
1989年 | 38710篇 |
1988年 | 36114篇 |
1987年 | 35353篇 |
1986年 | 33727篇 |
1985年 | 32144篇 |
1984年 | 23925篇 |
1983年 | 20821篇 |
1982年 | 12383篇 |
1981年 | 10930篇 |
1980年 | 10206篇 |
1979年 | 22641篇 |
1978年 | 15878篇 |
1977年 | 13733篇 |
1976年 | 12974篇 |
1975年 | 14207篇 |
1974年 | 16688篇 |
1973年 | 16081篇 |
1972年 | 15325篇 |
1971年 | 14232篇 |
1970年 | 13217篇 |
1969年 | 12732篇 |
1968年 | 11980篇 |
1967年 | 10480篇 |
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
61.
62.
G N J Tytgat 《Acta chirurgica. Supplement》2002,(587):77-81
A true comparison of long-term medical and surgical treatment in gastro-oesophageal reflux disease (GORD) is impossible as few studies have been carried out with adequate randomisation of the patients and long-term evaluation of quality of life. In general the control of the reflux symptoms is roughly equal with medical and surgical treatment. However, surgery can cause other symptoms such as dysphagia or non-specific epigastric discomfort or pain in some patients, which reduces the overall efficacy in controlling the symptoms. Based on a cost utility analysis, Heudebert et al. came to the conclusion that medical treatment was their preferred strategy for most patients with severe erosive oesophagitis. 相似文献
63.
64.
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
65.
66.
67.
68.
69.
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
70.
Macrophage NRAMP1 and its role in resistance to microbial infections 总被引:12,自引:0,他引:12