全文获取类型
收费全文 | 3587331篇 |
免费 | 286645篇 |
国内免费 | 13794篇 |
专业分类
耳鼻咽喉 | 48940篇 |
儿科学 | 113242篇 |
妇产科学 | 93070篇 |
基础医学 | 567402篇 |
口腔科学 | 98599篇 |
临床医学 | 322523篇 |
内科学 | 640890篇 |
皮肤病学 | 94495篇 |
神经病学 | 305733篇 |
特种医学 | 137314篇 |
外国民族医学 | 295篇 |
外科学 | 540426篇 |
综合类 | 103018篇 |
现状与发展 | 24篇 |
一般理论 | 2398篇 |
预防医学 | 313422篇 |
眼科学 | 81507篇 |
药学 | 246632篇 |
27篇 | |
中国医学 | 10017篇 |
肿瘤学 | 167796篇 |
出版年
2021年 | 57211篇 |
2020年 | 36202篇 |
2019年 | 60138篇 |
2018年 | 74786篇 |
2017年 | 56525篇 |
2016年 | 61839篇 |
2015年 | 76126篇 |
2014年 | 110844篇 |
2013年 | 176932篇 |
2012年 | 103942篇 |
2011年 | 105925篇 |
2010年 | 121379篇 |
2009年 | 124270篇 |
2008年 | 90968篇 |
2007年 | 95177篇 |
2006年 | 104176篇 |
2005年 | 99566篇 |
2004年 | 100423篇 |
2003年 | 90671篇 |
2002年 | 80141篇 |
2001年 | 106419篇 |
2000年 | 99609篇 |
1999年 | 98607篇 |
1998年 | 65045篇 |
1997年 | 62875篇 |
1996年 | 60998篇 |
1995年 | 56390篇 |
1994年 | 50610篇 |
1993年 | 47264篇 |
1992年 | 69398篇 |
1991年 | 66453篇 |
1990年 | 63095篇 |
1989年 | 62017篇 |
1988年 | 57841篇 |
1987年 | 56484篇 |
1986年 | 53966篇 |
1985年 | 53419篇 |
1984年 | 48977篇 |
1983年 | 45033篇 |
1982年 | 42022篇 |
1981年 | 39686篇 |
1980年 | 37420篇 |
1979年 | 41615篇 |
1978年 | 36898篇 |
1977年 | 33456篇 |
1976年 | 30698篇 |
1975年 | 29724篇 |
1974年 | 31393篇 |
1973年 | 30529篇 |
1972年 | 28770篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
62.
63.
64.
65.
Alejandra Gordillo Hernández Eduardo Dominguez-Adame Lanuza Auxiliadora Cano Matias Rosario Perez Huertas Katherine Maria Gallardo Rodriguez Purificacion Gallinato Perez Fernando Oliva Mompean 《World journal of gastrointestinal surgery》2015,7(8):170-173
Gangliocytic paragangliomas are rare tumors that almost exclusively occur within the second portion of the duodenum. Although these tumors generally have a benign clinical course, they have the potential to recur or metastasize to regional lymph nodes. The case report presented here describes a 57-year-old female patient with melena, progressive asthenia, anemia, and a mass in the second-third portion of the duodenum that was treated by local excision. The patient was diagnosed with a friable bleeding tumor. The histologic analysis showed that the tumor was a 4 cm gangliocytic paraganglioma without a malignant cell pattern. In the absence of local invasion or distant metastasis, endoscopic resection represents a feasible, curative therapy. Although endoscopic polypectomy is currently considered the treatment of choice, it is not recommended if the size of the tumor is > 3 cm and/or there is active or recent bleeding. Patients diagnosed with a gangliocytic paraganglioma should be closely followed-up for possible local recurrence. 相似文献
66.
M. R. D. Maslin S. K. Lloyd S. Rutherford S. Freeman A. King D. R. Moore K. J. Munro 《Journal of the Association for Research in Otolaryngology》2015,16(5):631-640
Individuals with sudden unilateral deafness offer a unique opportunity to study plasticity of the binaural auditory system in adult humans. Stimulation of the intact ear results in increased activity in the auditory cortex. However, there are no reports of changes at sub-cortical levels in humans. Therefore, the aim of the present study was to investigate changes in sub-cortical activity immediately before and after the onset of surgically induced unilateral deafness in adult humans. Click-evoked auditory brainstem responses (ABRs) to stimulation of the healthy ear were recorded from ten adults during the course of translabyrinthine surgery for the removal of a unilateral acoustic neuroma. This surgical technique always results in abrupt deafferentation of the affected ear. The results revealed a rapid (within minutes) reduction in latency of wave V (mean pre = 6.55 ms; mean post = 6.15 ms; p < 0.001). A latency reduction was also observed for wave III (mean pre = 4.40 ms; mean post = 4.13 ms; p < 0.001). These reductions in response latency are consistent with functional changes including disinhibition or/and more rapid intra-cellular signalling affecting binaurally sensitive neurons in the central auditory system. The results are highly relevant for improved understanding of putative physiological mechanisms underlying perceptual disorders such as tinnitus and hyperacusis. 相似文献
67.
68.
69.
70.