全文获取类型
收费全文 | 1959篇 |
免费 | 163篇 |
国内免费 | 8篇 |
专业分类
耳鼻咽喉 | 14篇 |
儿科学 | 59篇 |
妇产科学 | 34篇 |
基础医学 | 323篇 |
口腔科学 | 53篇 |
临床医学 | 242篇 |
内科学 | 449篇 |
皮肤病学 | 29篇 |
神经病学 | 133篇 |
特种医学 | 40篇 |
外科学 | 265篇 |
综合类 | 62篇 |
一般理论 | 3篇 |
预防医学 | 133篇 |
眼科学 | 53篇 |
药学 | 111篇 |
肿瘤学 | 127篇 |
出版年
2023年 | 15篇 |
2022年 | 18篇 |
2021年 | 45篇 |
2020年 | 28篇 |
2019年 | 49篇 |
2018年 | 46篇 |
2017年 | 37篇 |
2016年 | 35篇 |
2015年 | 47篇 |
2014年 | 59篇 |
2013年 | 94篇 |
2012年 | 109篇 |
2011年 | 130篇 |
2010年 | 66篇 |
2009年 | 43篇 |
2008年 | 97篇 |
2007年 | 114篇 |
2006年 | 96篇 |
2005年 | 104篇 |
2004年 | 105篇 |
2003年 | 94篇 |
2002年 | 89篇 |
2001年 | 53篇 |
2000年 | 54篇 |
1999年 | 42篇 |
1998年 | 17篇 |
1997年 | 15篇 |
1996年 | 22篇 |
1995年 | 21篇 |
1994年 | 17篇 |
1993年 | 19篇 |
1992年 | 16篇 |
1991年 | 25篇 |
1990年 | 32篇 |
1989年 | 28篇 |
1988年 | 23篇 |
1987年 | 33篇 |
1986年 | 24篇 |
1985年 | 17篇 |
1984年 | 18篇 |
1983年 | 10篇 |
1982年 | 6篇 |
1981年 | 10篇 |
1980年 | 12篇 |
1979年 | 7篇 |
1978年 | 10篇 |
1976年 | 7篇 |
1971年 | 6篇 |
1968年 | 5篇 |
1965年 | 5篇 |
排序方式: 共有2130条查询结果,搜索用时 453 毫秒
1.
HIV risk in vulnerable groups such as itinerant male street labourers is often examined via a focus on individual determinants. This study provides a test of a modified Information-Motivation-Behavioral Skills (IMB) model to predict condom use behaviour among male street workers in urban Vietnam. In a cross-sectional survey using a social mapping technique, 450 male street labourers from 13 districts of Hanoi, Vietnam were recruited and interviewed. Collected data were first examined for completeness; structural equation modelling was then employed to test the model fit. Condoms were used inconsistently by many of these men, and usage varied in relation to a number of factors. A modified IMB model had a better fit than the original IMB model in predicting condom use behaviour. This modified model accounted for 49% of the variance, versus 10% by the original version. In the modified model, the influence of psychosocial factors was moderately high, whilst the influence of HIV prevention information, motivation and perceived behavioural skills was moderately low, explaining in part the limited level of condom use behaviour. This study provides insights into social factors that should be taken into account in public health planning to promote safer sexual behaviour among Asian male street labourers. 相似文献
2.
3.
Michael Hutchinson Jonathon O'Riordan Mohammed Javed Etain Quin Donal Macerlaine Teresa Willcox Nollaig Parfrey Tamas G. Nagy Elisabeth Tournier-Lasserve 《Annals of neurology》1995,38(5):817-824
Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is a recently described familial cerebrovascular disorder shown to map to chromosome 19q12. Familial hemiplegic migraine has also been shown in some families to map close to the CADASIL locus. The fully developed CADASIL phenotype consists of recurrent strokes developing in the fourth decade, progressing to a pseudobulbar palsy, spastic quadriparesis, and subcortical dementia. In an Irish family 15 members were fully investigated by magnetic resonance scanning; 10 had typical magnetic resonance features of CADASIL. Five members of this family had familial hemiplegic migraine and 4 of these had magnetic resonance evidence of CADASIL. Two other members had migraine with and without aura as a presenting clinical symptom of CADASIL. This disorder has been shown by linkage analysis to map to the CADASIL locus at chromosome 19. The phenotype at presentation of CADASIL in this family was variable and age related and included familial hemiplegic migraine, migraine with and without aura, transient ischemic attacks, strokes, and spinal cord infarction. This family study increases our understanding of the spectrum of clinical manifestations of this underrecognized familial cerebrovascular disorder. 相似文献
4.
5.
6.
Sudden hearing loss is an important symptom which demands immediate evaluation. Although it may be attributed to a number of disorders, relatively few clinicopathological correlations have been described. The role of vascular disease in the aetiology of sudden hearing loss has been acknowledged in several case reports, but remains unclear and perhaps underemphasized, given the prevalence of vascular disease in other organ systems in Western communities. Five cases of sudden hearing loss due to presumed vascular disease are reported. It is postulated that vascular disease is an important factor in the pathogenesis, and one which may be overlooked in the management of sudden hearing loss. 相似文献
7.
8.
Dissecting aneurysms of the vertebral arteries following cervical manipulation: a case report. 总被引:1,自引:1,他引:0
下载免费PDF全文
![点击此处可从《Journal of neurology, neurosurgery, and psychiatry》网站下载免费的PDF全文](/ch/ext_images/free.gif)
J W Dunne G N Conacher M Khangure C G Harper 《Journal of neurology, neurosurgery, and psychiatry》1987,50(3):349-353
Neck manipulation may uncommonly be associated with serious and even fatal vascular complications. Although well recognised, the nature of the vascular injury has only rarely been directly established by pathological examination. The case is reported of a 43-year-old man who died following neck manipulation, and in whom multiple dissecting aneurysms within both vertebral arteries were demonstrated radiologically and found at necropsy. Bilateral dissecting aneurysms were found both at the level of atlanto-axial articulation and close to the origins of the vertebral arteries. No predisposition was found, other than early atheroma consistent with the patient's age. 相似文献
9.
10.