全文获取类型
收费全文 | 870篇 |
免费 | 52篇 |
国内免费 | 9篇 |
专业分类
耳鼻咽喉 | 5篇 |
儿科学 | 39篇 |
妇产科学 | 5篇 |
基础医学 | 94篇 |
口腔科学 | 93篇 |
临床医学 | 72篇 |
内科学 | 168篇 |
皮肤病学 | 40篇 |
神经病学 | 27篇 |
特种医学 | 149篇 |
外国民族医学 | 1篇 |
外科学 | 64篇 |
综合类 | 39篇 |
预防医学 | 55篇 |
眼科学 | 5篇 |
药学 | 45篇 |
中国医学 | 1篇 |
肿瘤学 | 29篇 |
出版年
2022年 | 2篇 |
2021年 | 3篇 |
2020年 | 4篇 |
2019年 | 7篇 |
2018年 | 10篇 |
2017年 | 16篇 |
2016年 | 13篇 |
2015年 | 27篇 |
2014年 | 15篇 |
2013年 | 28篇 |
2012年 | 24篇 |
2011年 | 32篇 |
2010年 | 35篇 |
2009年 | 46篇 |
2008年 | 27篇 |
2007年 | 22篇 |
2006年 | 23篇 |
2005年 | 14篇 |
2004年 | 31篇 |
2003年 | 18篇 |
2002年 | 8篇 |
2001年 | 7篇 |
2000年 | 6篇 |
1999年 | 18篇 |
1998年 | 54篇 |
1997年 | 62篇 |
1996年 | 56篇 |
1995年 | 43篇 |
1994年 | 40篇 |
1993年 | 37篇 |
1992年 | 7篇 |
1991年 | 11篇 |
1990年 | 16篇 |
1989年 | 14篇 |
1988年 | 22篇 |
1987年 | 23篇 |
1986年 | 21篇 |
1985年 | 9篇 |
1984年 | 4篇 |
1983年 | 8篇 |
1982年 | 18篇 |
1981年 | 3篇 |
1980年 | 9篇 |
1979年 | 4篇 |
1978年 | 4篇 |
1977年 | 5篇 |
1976年 | 6篇 |
1975年 | 2篇 |
1968年 | 3篇 |
1959年 | 2篇 |
排序方式: 共有931条查询结果,搜索用时 46 毫秒
81.
82.
83.
The number of patients diagnosed with autism spectrum disorders (ASD) in the United States has increased significantly. The objectives of this study were to explore general and pediatric dentists' professional attitudes and behavior towards patients with ASD; these dentists' perceptions of their dental education about these issues; and the relationships among their educational experiences, attitudes, and behaviors concerning patients with ASD. Survey data were collected from 162 general dentists in Michigan and 212 pediatric dentists across the United States. The results showed that 89 percent of pediatric dentists and 32 percent of general dentists treat patients with ASD. The respondents disagreed with statements indicating that their predoctoral dental education had prepared them well to treat patients with ASD. However, the better they felt prepared, the more likely they were to provide care for these patients. The frequency with which pediatric dentists said they use appropriate behavior management strategies when treating patients with ASD correlated with the quality of their educational experiences. In conclusion, given the growing number of patients with ASD, it is important to revisit dental education efforts targeted towards preparing future dental care providers for the treatment of patients with ASD and special needs. 相似文献
84.
背景及目的:Denosumab为一种人类单克隆抗体,它是核因子B配体(TANK)的受体激活剂(RANKL),RANKL,能够阻断该受体与RANK结合,从而抑制破骨细胞的生长及作用,减少骨的再吸收,增强骨密度.本研究分析了该药物对绝经后妇女骨质疏松症的预防作用. 相似文献
85.
86.
87.
间硝地平对左室肥厚大鼠左室舒张功能及心脑线粒体和血管组织钙含量的影响 总被引:1,自引:0,他引:1
用肾性高血压左室肥厚(LVH)大鼠模型,观察了间硝地平(m-Nif)和硝苯地平(Nif)长期给药(ig20mg·kg-1·d-1持续9周)对左室舒张功能、左心室肌和大脑线粒体及血管钙含量的影响。与假手术组相比,LVH组左室顺应性明显下降,僵硬度增高,左心室肌和大脑线粒体及尾动脉和主动脉钙含量增加。与LVH组相比,m-Nif和Nif各组左室顺应性改善,僵硬度降低(P<0.01),左心室肌线粒体及尾动脉和主动脉钙含量较LVH组显著降低(P<0.01)。两药在作用强度上无显著差异。 相似文献
88.
The development of a method to facilitate clinical negotiationwith diabetic patients is described. The principles of the methodincorporate patient centredness, an assessment of readinessto change and some elements of motivational interviewing. Asimple low cost technology is part of the innovative method.Details of the method and its application are published beforethe results of a randomized controlled trial to ensure thatthe techniques are in the public domain before the outcome ofthe trial is known. 相似文献
89.
Manna R; Todaro L; Latteri M; Gambassi G; Massi G; Grillo MR; Romito A; Caputo S; Gasbarrini GB 《Rheumatology (Oxford, England)》1997,36(1):124-125
The actiopathogenesis of leucocytoclastic vasculitis is still unknown, but
recently hepatitis C virus (HCV) has been suggested as trigger of
autoimmunity. We report a case of a 26-yr-old patient with purpura due to
leucocytoclastic vasculitis associated with hepatitis C virus infection.
Laboratory findings showed AST, ALT, gamma GT within normal limits,
positive antibodies to HCV (IIF and Riba II) and polymerase chain reaction
for HCV RNA. Anti-nuclear antibodies, IgG and IgM anti- cardiolipin
antibodies, anti-platelet antibodies and anti-neutrophil cytoplasmic
antibodies with perinuclear pattern were also present. A skin biopsy
specimen of a purpuric lesion showed leucocytoclastic vasculitis with small
vessel thrombosis and perivascular deposition of IgM and fibrinogen on
immunofluorescence study. This case shows a role of HCV in leucocytoclastic
vasculitis; it is possible that this HCV can induce autoimmunity
independently of cryoglobulins and liver involvement.
相似文献
90.
Differentiation of thrombi from slow flow in the pulmonary arteries, sometimes observed in the presence of pulmonary arterial hypertension, can be equivocal. Magnetic resonance (MR) imaging was performed in a patient with chronic pulmonary thromboembolism and pulmonary arterial hypertension using an electrocardiographically gated technique that allowed visualization of the pulmonary arteries at the end of diastole and multiple times during systole. These images were compared with those of a patient with primary pulmonary hypertension and those of healthy subjects. Thrombi were discrete structures, seen throughout the cardiac cycle on both the first and second spin-echo images, and decreased in signal intensity on the second image. Slow flow increased in signal intensity and changed in structure during the cardiac cycle and was seen best on the second image. MR may play an important role in excluding large central thrombi as the cause of pulmonary arterial hypertension. It is a noninvasive method for defining pulmonary arterial wall thickness and for direct visualization of chronic pulmonary thrombus. 相似文献