全文获取类型
收费全文 | 897篇 |
免费 | 23篇 |
国内免费 | 11篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 33篇 |
妇产科学 | 10篇 |
基础医学 | 81篇 |
口腔科学 | 10篇 |
临床医学 | 60篇 |
内科学 | 112篇 |
皮肤病学 | 29篇 |
神经病学 | 7篇 |
特种医学 | 108篇 |
外科学 | 107篇 |
综合类 | 260篇 |
预防医学 | 28篇 |
眼科学 | 4篇 |
药学 | 31篇 |
肿瘤学 | 50篇 |
出版年
2023年 | 1篇 |
2022年 | 3篇 |
2021年 | 7篇 |
2020年 | 3篇 |
2019年 | 5篇 |
2018年 | 7篇 |
2017年 | 7篇 |
2016年 | 5篇 |
2015年 | 28篇 |
2014年 | 14篇 |
2013年 | 18篇 |
2012年 | 19篇 |
2011年 | 14篇 |
2010年 | 48篇 |
2009年 | 47篇 |
2008年 | 38篇 |
2007年 | 49篇 |
2006年 | 62篇 |
2005年 | 39篇 |
2004年 | 57篇 |
2003年 | 27篇 |
2002年 | 28篇 |
2001年 | 20篇 |
2000年 | 24篇 |
1999年 | 31篇 |
1998年 | 42篇 |
1997年 | 51篇 |
1996年 | 52篇 |
1995年 | 32篇 |
1994年 | 31篇 |
1993年 | 9篇 |
1992年 | 10篇 |
1991年 | 5篇 |
1990年 | 7篇 |
1989年 | 7篇 |
1988年 | 15篇 |
1987年 | 9篇 |
1986年 | 10篇 |
1985年 | 7篇 |
1984年 | 11篇 |
1983年 | 4篇 |
1982年 | 7篇 |
1981年 | 6篇 |
1980年 | 4篇 |
1978年 | 3篇 |
1977年 | 4篇 |
1976年 | 2篇 |
1975年 | 2篇 |
排序方式: 共有931条查询结果,搜索用时 15 毫秒
1.
SK Raina 《Journal of postgraduate medicine》2015,61(3):213-Sep;61(3):213
2.
3.
4.
Sonoelasticity imaging of prostate cancer: in vitro results 总被引:2,自引:0,他引:2
5.
6.
Guntur E Luis Chee-Khuen Yong Deepak A Singh S Sengupta David SK Choon 《Journal of orthopaedic surgery and research》2007,2(1):22-10
Background
Acromioclavicular injuries are common in sports medicine. Surgical intervention is generally advocated for chronic instability of Rockwood grade III and more severe injuries. Various methods of coracoclavicular ligament reconstruction and augmentation have been described. The objective of this study is to compare the biomechanical properties of a novel palmaris-longus tendon reconstruction with those of the native AC+CC ligaments, the modified Weaver-Dunn reconstruction, the ACJ capsuloligamentous complex repair, screw and clavicle hook plate augmentation. 相似文献7.
8.
The determination of a unicellular or a multicellular origin of a tumor is an important due for understanding its etiology. To investigate this issue, we performed clonality assay of cervix cancer using polymerase chain reaction based on highly polymorphic locus of the androgen receptor gene, in which methylation of DNA correlates with inactivation of X chromosome. DNA samples were obtained from formalin-fixed, paraffin-embedded tissue of 20 invasive epidermoid carcinomas and 10 carcinoma in situ. Seven of ten carcinoma in situ, heterozygous for the androgen receptor locus, were monoclonal pattern. Among twenty invasive epidermoid carcinomas, eighteen of which showed heterozygous, twelve were monoclonal pattern and six were polyclonal pattern. We conclude that carcinoma in situ arises from a single cell. In invasive epidermoid carcinoma, most cases were monoclonal, although some cases were polyclonal. These suggest that invasive carcinoma of the cervix does not always arise from a single cell, but may arise from several cells with different mechanisms. 相似文献
9.
10.
The magnetic resonance (MR) images of six patients with thrombosis of a dural sinus were reviewed. The diagnosis had been verified by computed tomographic scans in three patients and arteriograms in two; in the sixth patient, only MR imaging was used to confirm the clinical syndrome. In all patients, high-intensity signal was seen from the thrombus within the affected dural sinus on all echoes. This persistent signal intensity allowed intravascular clot to be distinguished from normal causes of increased signal such as flow-related enhancement (entry phenomenon) and even-echo rephasing. MR imaging demonstrated the cause of the thrombosis in three patients: two were secondary to adjacent tumors, and one was secondary to unsuspected mastoiditis. Complications such as infarction were also demonstrated. Using MR imaging, one can easily and safely diagnose thrombosis of a dural sinus. MR should be the imaging method of choice in patients suspected of having thrombosis of a dural sinus. 相似文献