全文获取类型
收费全文 | 3058篇 |
免费 | 154篇 |
国内免费 | 81篇 |
专业分类
耳鼻咽喉 | 30篇 |
儿科学 | 100篇 |
妇产科学 | 60篇 |
基础医学 | 413篇 |
口腔科学 | 204篇 |
临床医学 | 332篇 |
内科学 | 600篇 |
皮肤病学 | 118篇 |
神经病学 | 231篇 |
特种医学 | 356篇 |
外科学 | 235篇 |
综合类 | 44篇 |
一般理论 | 2篇 |
预防医学 | 139篇 |
眼科学 | 55篇 |
药学 | 204篇 |
肿瘤学 | 170篇 |
出版年
2022年 | 29篇 |
2021年 | 36篇 |
2019年 | 43篇 |
2018年 | 43篇 |
2017年 | 41篇 |
2016年 | 38篇 |
2015年 | 51篇 |
2014年 | 46篇 |
2013年 | 77篇 |
2012年 | 89篇 |
2011年 | 103篇 |
2010年 | 101篇 |
2009年 | 84篇 |
2008年 | 82篇 |
2007年 | 134篇 |
2006年 | 100篇 |
2005年 | 114篇 |
2004年 | 87篇 |
2003年 | 80篇 |
2002年 | 85篇 |
2001年 | 62篇 |
2000年 | 85篇 |
1999年 | 63篇 |
1998年 | 104篇 |
1997年 | 118篇 |
1996年 | 123篇 |
1995年 | 98篇 |
1994年 | 109篇 |
1993年 | 85篇 |
1992年 | 49篇 |
1991年 | 71篇 |
1990年 | 63篇 |
1989年 | 69篇 |
1988年 | 66篇 |
1987年 | 56篇 |
1986年 | 67篇 |
1985年 | 51篇 |
1984年 | 29篇 |
1983年 | 43篇 |
1982年 | 36篇 |
1981年 | 35篇 |
1980年 | 25篇 |
1979年 | 26篇 |
1978年 | 25篇 |
1977年 | 31篇 |
1976年 | 27篇 |
1975年 | 37篇 |
1974年 | 21篇 |
1972年 | 23篇 |
1971年 | 21篇 |
排序方式: 共有3293条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
Mice treated intraperitoneally with zymosan showed a strong inhibition of the DTHR (delayed-type hypersensitivity reaction) against sheep erythrocytes (SE), ovalbumin (OA), and alloantigen. Furthermore, the rejection time of skin transplants was nearly doubled while antibody formation against SE was significantly enhanced. When a DTHR against OA and an antibody formation against SE were induced at the same time in the same animals, than the suppressive and stimulating effects cancelled each other. These results are discussed with regard to the sensitivity of lymphocyte subpopulations, which may be different if exposed to phagocytosis-induced oxygen radicals. 相似文献
5.
6.
H Gellman R R Eckert M J Botte I Sakimura R L Waters 《Clinical orthopaedics and related research》1988,(233):126-131
Sixty consecutive patients admitted to the spinal cord injury unit at a Downey, California medical center were evaluated for hand and upper extremity pain. Patients averaged nine months postinjury and had an average age of 37 years. Seven patients (11.7%) complained of diffuse hand pain, swelling, and stiffness. All patients with complaints were evaluated with three-phase radionuclide scintigraphy. Six of those seven patients had scintigrams consistent with reflex sympathetic dystrophy (RSD), an overall incidence of 10%. Three of these six patients were treated with stellate ganglion blocks, which gave relief of symptoms and allowed return to their rehabilitation program. An awareness of RSD as a cause of pain in spinal cord injured patients should lead to earlier recognition and treatment. 相似文献
7.
8.
9.
A 25-year-old homosexual black male presented with asymmetrical perianal ulceration of uncertain clinical origin. Indepth microbiological examination revealed the combined presence of Haemophilus ducreyi and Treponema pallidum. The atypical clinical appearance may have been due to the changed immunological status of the host's being infected with Human Immunodeficiency Virus. 相似文献
10.
WINOCOUR PH; KALUVYA S; BROWN L; FARRER M; MILLAR JP; NEIL HAW; ALBERTI KGMM 《QJM : monthly journal of the Association of Physicians》1991,79(3):539-560
Hyperinsulinaemia is said to be a risk factor for cardiovasculardisease, but the extent to which different insulinaemic measuresare associated with vascular risk factors in ostensibly healthyindividuals, and whether they operate independently in men andwomen, remains uncertain. The association between risk factors and various insulinaemicmeasures was examined in 148 men and 118 women who were normoglycaemic,normotensive, and non-obese (body mass index in men <27,in women <25). A 75 g glucose tolerance test was administeredafter blood sampling for fibrinogen, lipids, lipoproteins andinsulin. Insulin was also measured after 1 and 2 hours. Significantunivariate correlations (p<0.01) were most consistently recordedbetween insulinaemic measures and fasting serum triglyceridesin men and women, whilst systolic blood pressure only correlatedwith insulinaemia in women, and diastolic blood pressure correlatedwith fasting and 2 hour insulinaemic measures in men and women.Inconsistent associations were noted with total serum cholesterolin men and women, with high density lipoprotein cholesterol,body mass index, apoprotein B and A1 in men, and with fibrinogenin women. Age was not correlated with any insulinaemic measurein men or women. Differences in vascular risk factors between quintiles of theinsulinaemic measures were examined, after correction for bodymass index. The dominant association with fasting and post-glucoseload insulinaemic measures was with triglycerides, especiallyin women, with less frequent graded differences between quintilesobserved for total cholesterol, and diastolic and systolic bloodpressures in men and women. The incidence of other risk factors often only differed in thelowest or highest quintile in comparison to other quintiles,suggesting a threshold rather than a graded effect. Furthermore,differences in HDL cholesterol and apoprotein B were only recordedfor top quintiles of post-glucose challenge/integrated insulinaemicmeasures in men, whilst serum fibrinogen concentrations onlydiffered significantly in women in the top insulinaemic areaunder the curve quintile. In the absence of additional risk factors such as diabetes,hypertension and obesity, insulinaemic measures are not consistentlyrelated to blood pressure and measures of lipid metabolism andcoagulation, and are thus a weak predictor of other cardiovascularrisk factors. The vascular risk profile associated with insulinappears somewhat different in apparently healthy men and women. 相似文献