全文获取类型
收费全文 | 4732篇 |
免费 | 233篇 |
国内免费 | 25篇 |
专业分类
耳鼻咽喉 | 25篇 |
儿科学 | 111篇 |
妇产科学 | 113篇 |
基础医学 | 424篇 |
口腔科学 | 117篇 |
临床医学 | 444篇 |
内科学 | 1112篇 |
皮肤病学 | 55篇 |
神经病学 | 165篇 |
特种医学 | 302篇 |
外国民族医学 | 1篇 |
外科学 | 805篇 |
综合类 | 169篇 |
一般理论 | 3篇 |
预防医学 | 278篇 |
眼科学 | 134篇 |
药学 | 360篇 |
1篇 | |
中国医学 | 15篇 |
肿瘤学 | 356篇 |
出版年
2023年 | 46篇 |
2022年 | 138篇 |
2021年 | 235篇 |
2020年 | 98篇 |
2019年 | 134篇 |
2018年 | 176篇 |
2017年 | 94篇 |
2016年 | 88篇 |
2015年 | 150篇 |
2014年 | 205篇 |
2013年 | 216篇 |
2012年 | 309篇 |
2011年 | 315篇 |
2010年 | 207篇 |
2009年 | 169篇 |
2008年 | 260篇 |
2007年 | 275篇 |
2006年 | 255篇 |
2005年 | 240篇 |
2004年 | 169篇 |
2003年 | 167篇 |
2002年 | 160篇 |
2001年 | 69篇 |
2000年 | 78篇 |
1999年 | 57篇 |
1998年 | 41篇 |
1997年 | 32篇 |
1996年 | 29篇 |
1995年 | 33篇 |
1994年 | 35篇 |
1993年 | 30篇 |
1992年 | 44篇 |
1991年 | 44篇 |
1990年 | 34篇 |
1989年 | 31篇 |
1988年 | 33篇 |
1987年 | 23篇 |
1986年 | 37篇 |
1985年 | 34篇 |
1984年 | 25篇 |
1983年 | 18篇 |
1981年 | 12篇 |
1980年 | 14篇 |
1979年 | 8篇 |
1978年 | 14篇 |
1977年 | 20篇 |
1976年 | 10篇 |
1974年 | 8篇 |
1970年 | 10篇 |
1969年 | 11篇 |
排序方式: 共有4990条查询结果,搜索用时 15 毫秒
1.
2.
3.
Farid Saad 《Asian journal of andrology》2015,17(1):58-60
It is no exaggeration to say that our conceptualization of the (patho-) physiological functions of testosterone has undergone a revolutionary development over the last three decades. The traditional thinking was that the biological functions of testosterone were restricted mainly to the area of reproduction and male sexuality. However, scientific research has clearly demonstrated that testosterone is a multi-system hormone serving a wide range of hitherto unsuspected biological functions.In line with this, it will be argued in this contribution that the physiological role of testosterone has been underestimated, while the risks of testosterone administration have been overstated. Space does not permit to elaborate extensively on all new insights of the role of testosterone in the biology of the male. Three areas will be addressed: (1) the role that testosterone can play in body weight management of hypogonadal men; (2) the role of testosterone in inflammatory processes; (3) the strategy required to let patients benefit from the recent insights that testosterone is a multi-system hormone whose use should not be limited to reproductive/sexual medicine. 相似文献
4.
5.
6.
Ulrich Weber Christian WA Pfirrmann Rudolf O Kissling Juerg Hodler Marco Zanetti 《BMC musculoskeletal disorders》2007,8(1):20
Background
Ankylosing spondylitis is a chronic inflammatory rheumatic disorder which usually begins in early adulthood. The diagnosis is often delayed by many years. MR imaging has become the preferred imaging method for detection of early inflammation of the axial skeleton in ankylosing spondylitis. 相似文献7.
8.
In addition to a working knowledge of general complications such as thromboembolism and infective endocarditis, optimal care of the patient with a prosthetic valve requires specific knowledge concerning the characteristics of a given patient's prosthesis. This may need to include the ability to identify the valve roentgenographically when history and records are unavailable. A 53-year-old woman with mitral stenosis secondary to rheumatic heart disease and status post a reported Bjork-Shiley mitral valve (MV) replacement 17 years prior to hospital admission was referred for evaluation of severe hemolytic anemia. Previous cinefluoroscopy in 1986 at the time of a cerebrovascular accident revealed a normally functioning caged disc prosthesis and not the tilting disc of a Bjork-Shiley prosthetic valve. The valve was not further characterized and she continued receiving warfarin therapy until May 1989 when she presented with laboratory findings showing a marked hemolytic anemia with a hemoglobin of 6.5 mg/dl and lactate dehydrogenase (LDH) value of 2100 IU. Echocardiography revealed normal valvular function without evidence of perivalvular leak. The patient was referred for further evaluation with chest roentgenogram at the time of hospital admission revealing a valve configuration characteristic of the Beall model 103/104 series that has been found to manifest progressive disc variance with a high degree of hemolytic anemia (despite normal noninvasive evaluation of MV function), disc tilting with intermittent regurgitation, and catastrophic disc embolization in extreme cases. The precise identification of valvular prosthesis in patients after valve replacement is crucial for optimal management. As in our case, the mere identification of a particular valve may necessitate certain management and therapy based on the natural history of that valve. In the absence of reliable history and/or records, the roentgenographic examination should lead to the precise identification. 相似文献
9.
10.