全文获取类型
收费全文 | 1135篇 |
免费 | 99篇 |
国内免费 | 28篇 |
专业分类
儿科学 | 61篇 |
妇产科学 | 13篇 |
基础医学 | 114篇 |
口腔科学 | 52篇 |
临床医学 | 168篇 |
内科学 | 224篇 |
皮肤病学 | 24篇 |
神经病学 | 31篇 |
特种医学 | 270篇 |
外科学 | 98篇 |
综合类 | 27篇 |
预防医学 | 60篇 |
眼科学 | 5篇 |
药学 | 60篇 |
肿瘤学 | 55篇 |
出版年
2023年 | 4篇 |
2021年 | 8篇 |
2019年 | 12篇 |
2018年 | 21篇 |
2017年 | 11篇 |
2016年 | 12篇 |
2015年 | 20篇 |
2014年 | 24篇 |
2013年 | 13篇 |
2012年 | 19篇 |
2011年 | 32篇 |
2010年 | 38篇 |
2009年 | 29篇 |
2008年 | 28篇 |
2007年 | 43篇 |
2006年 | 40篇 |
2005年 | 29篇 |
2004年 | 25篇 |
2003年 | 39篇 |
2002年 | 36篇 |
2001年 | 27篇 |
2000年 | 22篇 |
1999年 | 23篇 |
1998年 | 61篇 |
1997年 | 76篇 |
1996年 | 80篇 |
1995年 | 51篇 |
1994年 | 43篇 |
1993年 | 45篇 |
1992年 | 18篇 |
1991年 | 15篇 |
1990年 | 20篇 |
1989年 | 42篇 |
1988年 | 42篇 |
1987年 | 31篇 |
1986年 | 34篇 |
1985年 | 31篇 |
1984年 | 9篇 |
1983年 | 11篇 |
1982年 | 14篇 |
1981年 | 12篇 |
1980年 | 13篇 |
1979年 | 4篇 |
1978年 | 6篇 |
1977年 | 13篇 |
1976年 | 10篇 |
1975年 | 7篇 |
1973年 | 4篇 |
1969年 | 3篇 |
1968年 | 2篇 |
排序方式: 共有1262条查询结果,搜索用时 15 毫秒
1.
Isolated patellofemoral arthritis is an increasingly recognized entity, and is usually associated with previous patellofemoral dysplasia or instability. Patellofemoral arthroplasty (PFA) has evolved significantly in recent years, both in terms of implant design and importantly in the understanding of appropriate patient selection. This review outlines the indications and investigations for PFA, provides a brief history of the development of contemporary implants, and presents the clinical outcomes for the prostheses most commonly used in the UK. In addition, it provides a detailed surgical technique for implantation of an onlay implant, with tips on how to optimize patellofemoral biomechanics and thus achieve a consistently good outcome. 相似文献
2.
3.
Sonoelasticity imaging of prostate cancer: in vitro results 总被引:2,自引:0,他引:2
4.
Carl J O'Kane Douglas C Tutt Lyndon A Bauer 《Emergency medicine Australasia : EMA》2002,14(3):296-303
Cannabis and driving is an emerging injury‐prevention concern. The incidence of driving while affected by cannabis is rising in parallel with increased cannabis use in the community. Younger drivers are at particular risk. Improvements in research methodology, technology and laboratory testing methods have occurred in the last 10 years. These cast doubt on earlier results and conclusions. Studies now show that cannabis has a significant impairing effect on driving when used alone and that this effect is exaggerated when combined with alcohol. Of particular concern is the presence of cannabis as the sole psychoactive drug in an increasing number of road fatalities and the lack of any structural response to this problem. A review of testing methods, laboratory and real driving studies, and recent epidemiological studies is presented. Suggestions for methods of further data collection and future public policy are made. 相似文献
5.
M M O'Kane P A King H D Edmondson 《International journal of oral and maxillofacial surgery》1986,15(4):422-424
Button wiring has been used as an alternative to eyelet wiring in the Department of Oral and Dental Surgery of Birmingham General Hospital since 1977. This clinical update reviews 65 patients with mandibular fractures in which button wires were utilised in their treatment. 相似文献
6.
7.
8.
9.
10.
Ten thrombocytopenic patients (platelets < 10–24 × 10(9)/L) who were refractory to platelet transfusion were investigated for their responsiveness to staphylococcal protein A column therapy. Nine patients had previously been treated with steroids, intravenous immune globulin, and/or other forms of immunosuppressive therapy without improvement in their transfusion response. All patients were receiving multiple platelet transfusions without achieving 1-hour corrected count increments (CCIs) > or = 7500. Eight patients had antibodies that reacted with platelets and were directed against HLA class I antigens, ABO antigens, and/or platelet-specific alloantigens. Plasma (500-2000 mL) from each patient was passed over a protein A silica gel column and then returned to the patient. Patients received from 1 to 14 treatments. A positive response to protein A therapy was defined as at least a doubling of the pretreatment platelet count and/or two successive 10- to 120-minute posttransfusion CCIs > or = 7500. Following plasma treatments, 6 of 10 patients responded with daily platelet counts that averaged 48 +/− 11 × 10(9) per L as compared with counts of 16 +/− 7 × 10(9) per L (p < 0.0005) before treatment. Posttransfusion CCI values determined in four of these patients averaged 2480 +/− 810 and 10,010 +/− 3540 (p < 0.005) before and after treatment, respectively. In contrast, among the four unresponsive patients, platelet counts averaged 10 +/− 9 and 13 +/− 10 × 10(9) per L (p = NS), respectively, while posttransfusion CCIs were 700 +/− 1410 and 1520 +/− 2460 (p = NS), respectively.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献