全文获取类型
收费全文 | 248961篇 |
免费 | 8220篇 |
国内免费 | 5676篇 |
专业分类
耳鼻咽喉 | 1682篇 |
儿科学 | 7390篇 |
妇产科学 | 3559篇 |
基础医学 | 23908篇 |
口腔科学 | 2752篇 |
临床医学 | 21661篇 |
内科学 | 40375篇 |
皮肤病学 | 1240篇 |
神经病学 | 19935篇 |
特种医学 | 11886篇 |
外国民族医学 | 39篇 |
外科学 | 36671篇 |
综合类 | 17884篇 |
现状与发展 | 14篇 |
一般理论 | 16篇 |
预防医学 | 24026篇 |
眼科学 | 4270篇 |
药学 | 17772篇 |
84篇 | |
中国医学 | 5670篇 |
肿瘤学 | 22023篇 |
出版年
2024年 | 294篇 |
2023年 | 1103篇 |
2022年 | 2834篇 |
2021年 | 3508篇 |
2020年 | 2870篇 |
2019年 | 2260篇 |
2018年 | 24149篇 |
2017年 | 19577篇 |
2016年 | 21477篇 |
2015年 | 4384篇 |
2014年 | 5129篇 |
2013年 | 5074篇 |
2012年 | 13238篇 |
2011年 | 27923篇 |
2010年 | 23674篇 |
2009年 | 15623篇 |
2008年 | 24004篇 |
2007年 | 26168篇 |
2006年 | 4808篇 |
2005年 | 6033篇 |
2004年 | 6050篇 |
2003年 | 6704篇 |
2002年 | 4517篇 |
2001年 | 1875篇 |
2000年 | 1848篇 |
1999年 | 1294篇 |
1998年 | 961篇 |
1997年 | 938篇 |
1996年 | 661篇 |
1995年 | 611篇 |
1994年 | 478篇 |
1993年 | 340篇 |
1992年 | 273篇 |
1991年 | 276篇 |
1990年 | 309篇 |
1989年 | 255篇 |
1988年 | 187篇 |
1987年 | 165篇 |
1986年 | 119篇 |
1985年 | 123篇 |
1984年 | 67篇 |
1983年 | 53篇 |
1982年 | 52篇 |
1981年 | 24篇 |
1980年 | 54篇 |
1938年 | 60篇 |
1937年 | 25篇 |
1934年 | 30篇 |
1932年 | 59篇 |
1930年 | 46篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
We report clinical, neuroradiologic features, and neuropathologic findings of a 76‐year‐old man with coexistent Pick’s disease and progressive supranuclear palsy. The patient presented with loss of recent memory, abnormal behavior and change in personality at the age of 60. The symptoms were progressive. Three years later, repetitive or compulsive behavior became prominent. About 9 years after onset, he had difficulty moving and became bed‐ridden because of a fracture of his left leg. His condition gradually deteriorated and he developed mutism and became vegetative. The patient died from pneumonia 16 years after the onset of symptoms. Serial MRI scans showed progressive cortex atrophy, especially in the bilateral frontal and temporal lobes. Macroscopic inspection showed severe atrophy of the whole brain, including cerebrum, brainstem and cerebellum. Microscopic observations showed extensive superficial spongiosis and severe neuronal loss with gliosis in the second and third cortical layers in the frontal, temporal and parietal cortex. There were Pick cells and argyrophilic Pick bodies, which were tau‐ and ubiquitin‐positive in neurons of layers II–III of the above‐mentioned cortex. Numerous argyrophilic Pick bodies were observed in the hippocampus, especially in the dentate fascia. In addition, moderate to severe loss of neurons was found with gliosis and a lot of Gallyas/tau‐positive globus neurofibrillary tangles in the caudate nucleus, globus pallidus, thalamus, substantia nigra, locus coeruleus and dentate nucleus. Numerous thorned‐astrocytes and coiled bodies but no‐tuft shaped astrocytes were noted in the basal ganglion, brainstem and cerebellar white matter. In conclusion, these histopathological features were compatible with classical Pick’s disease and coexistence with progressive supranuclear palsy without tuft‐shaped astrocytes. 相似文献
4.
5.
6.
逍遥散出自《太平惠民和剂局方》,由当归、白芍药、柴胡、茯苓、白术、炙甘草、薄荷、煨姜组成。经前期综合征为临床常见的妇科病症,笔者近年来采用逍遥散加减治疗经前期综合征69例,疗效满意,现报道如下。 相似文献
7.
Debra L. Roter Richard M. Frankel Judith A. Hall David Sluyter 《Journal of general internal medicine》2006,21(1):28-34
Relationship-centered care reflects both knowing and feeling: the knowledge that physician and patient bring from their respective domains of expertise, and the physician’s and patient’s experience, expression, and perception of emotions during the medical encounter. These processes are conveyed and reciprocated in the care process through verbal and nonverbal communication. We suggest that the emotional context of care is especially related to nonverbal communication and that emotion-related communication skills, including sending and receiving nonverbal messages and emotional self-awareness, are critical elements of high-quality care. Although nonverbal behavior has received far less study than other care processes, the current review argues that it holds significance for the therapeutic relationship and influences important outcomes including satisfaction, adherence, and clinical outcomes of care. 相似文献
8.
缺氧缺血性脑病新生鼠补钙前后脑细胞,红细胞内外钙的变化 总被引:31,自引:0,他引:31
为了观察一般剂量补钙对缺氧缺血性脑病(HIE)脑细胞和红细胞内外钙变化的影响,以探讨HIE时补钙是否增加脑细胞钙超载,用HIE新生动物模型进行了实验研究,结果表明:(1)缺氧缺血时红细胞、脑细胞及脑组织出现钙积聚;(2)补钙后,血浆总钙浓度明显升高,而脑细胞、脑组织及红细胞钙积聚并未加重;(3)血浆总钙浓度与脑细胞或红细胞胞浆游离钙离子浓度无相关关系。提示:(1)HIE时钙内流可能是全身性的;(2)对HIE并低钙血症患儿吸氧后一般剂量补钙可能是安全的。 相似文献
9.
10.
强直性脊柱炎患者外周血CD62P的表达 总被引:1,自引:1,他引:0
目的探讨剖宫产指征的变化情况,分析影响剖宫产率的因素。方法 回顾性分析1393例剖宫产患者的临床资料。结果2年的平均剖宫产率为66.7%,其中2004年的剖宫产率为59.9%,2005年的剖富产率为72.2%,差异有统计学意义(P〈0.05)。剖宫产率的主要影响因素依次为社会因素(29.43%)、胎儿宫内窘迫(25.13%)、胎位异常(9.62%)、巨大胎儿(7.25%)、中至重度妊娠高血压综合征(6.25%)。结论剖宫产率的上升不只是一个纯医学问题,社会因素使剖宫产指征相对扩大,只有合理掌握剖宫产指征,通过医患双方、社会的共同努力,才能更好地降低剖宫产率。 相似文献