全文获取类型
收费全文 | 2667篇 |
免费 | 224篇 |
国内免费 | 56篇 |
专业分类
耳鼻咽喉 | 46篇 |
儿科学 | 142篇 |
妇产科学 | 45篇 |
基础医学 | 335篇 |
口腔科学 | 173篇 |
临床医学 | 215篇 |
内科学 | 658篇 |
皮肤病学 | 85篇 |
神经病学 | 87篇 |
特种医学 | 224篇 |
外科学 | 212篇 |
综合类 | 101篇 |
一般理论 | 1篇 |
预防医学 | 270篇 |
眼科学 | 19篇 |
药学 | 202篇 |
中国医学 | 15篇 |
肿瘤学 | 117篇 |
出版年
2023年 | 30篇 |
2022年 | 49篇 |
2021年 | 105篇 |
2020年 | 69篇 |
2019年 | 61篇 |
2018年 | 104篇 |
2017年 | 90篇 |
2016年 | 77篇 |
2015年 | 78篇 |
2014年 | 127篇 |
2013年 | 167篇 |
2012年 | 179篇 |
2011年 | 157篇 |
2010年 | 125篇 |
2009年 | 127篇 |
2008年 | 107篇 |
2007年 | 136篇 |
2006年 | 95篇 |
2005年 | 75篇 |
2004年 | 75篇 |
2003年 | 52篇 |
2002年 | 68篇 |
2001年 | 55篇 |
2000年 | 50篇 |
1999年 | 42篇 |
1998年 | 80篇 |
1997年 | 69篇 |
1996年 | 63篇 |
1995年 | 53篇 |
1994年 | 50篇 |
1993年 | 42篇 |
1992年 | 21篇 |
1991年 | 10篇 |
1990年 | 25篇 |
1989年 | 29篇 |
1988年 | 31篇 |
1987年 | 21篇 |
1986年 | 25篇 |
1985年 | 23篇 |
1984年 | 10篇 |
1983年 | 14篇 |
1982年 | 11篇 |
1981年 | 5篇 |
1980年 | 8篇 |
1979年 | 8篇 |
1978年 | 7篇 |
1977年 | 5篇 |
1976年 | 12篇 |
1975年 | 9篇 |
1969年 | 4篇 |
排序方式: 共有2947条查询结果,搜索用时 15 毫秒
1.
2.
John Lennon Silva Cunha Amanda Almeida Leite Thamiris de Castro Abrantes Lorena Passoni Vervloet Thayn Melo de Lima Morais Gerson de Oliveira Paiva Neto Tatiana Nayara Librio Kimura Snia Maria Soares Ferreira Ricardo Luiz Cavalcanti de Albuquerque‐Júnior Aline Corrêa Abraho Mario Jos Romaach Bruno Augusto Benevenuto de Andrade Oslei Paes de Almeida Ciro Dantas Soares 《Journal of cutaneous pathology》2021,48(1):24-33
3.
By injecting small amounts of CO2 through a needle, one can move bowel or bladder from the intended path of instruments during interventional procedures. The technique worked well in six of seven cases in the pelvis and retroperitoneum; it was not effective in the mediastinum or midabdomen (n = 6). 相似文献
4.
Carlos Alberto Herrero de Morais Norberti Bernardineli Roberto B Garcia Marco A H Duarte Danilo M Z Guerisoli 《Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics》2006,102(3):417-421
OBJECTIVE: The aim of this study was to evaluate the biocompatibility of Portland cement with the addition of iodoform, compared to MTA (ProRoot). STUDY DESIGN: Eighteen Wistar albino rats were divided into 3 groups of 6 animals each. Polyethylene tubes were filled either with freshly mixed MTA or Portland cement mixed with iodoform (20% wt/wt) and implanted subcutaneously. An empty tube served as control. After 7, 30, or 60 days, the implants together with the surrounding tissues were removed in blocks. Sections were evaluated for the presence and thickness of a fibrous capsule, presence of granulation tissue, and the severity of inflammatory response. Data were submitted to nonparametric statistical analysis with individual comparisons between groups at a significance level of P < 0.05. RESULTS: There were no differences between inflammatory responses at 7 and 30 days. After 60 days from surgical removal, there was significantly more tissue reaction to the MTA and Portland cement compared to the control group. CONCLUSION: There were no significant differences regarding inflammatory responses between MTA and Portland cement with iodoform after 7, 30, or 60 days. After 60 days, the fibrous capsule around the Portland cement appeared more organized than tissue surrounding MTA implants. After 60 days, there was still a significantly increased tissue reaction to the 2 cements compared to the empty polyethylene tubes. 相似文献
5.
外科医生和手术室人员经常接触手术设备产生的烟气,病人也会暴露于烟气中,特别是腹腔镜手术中产生的烟气滞留于腹腔内这一密闭空间并被吸收.这些烟气是一种与香烟烟气相似的毒性物质,然而对这种毒性物质的影响还未引起足够重视.应该采取必要措施尽可能减少手术中烟气的不良影响. 相似文献
6.
7.
Humberto Morais Luísa Moura Branco Rosa Cunha Telmo Martins 《Revista portuguesa de cardiologia》2007,26(4):367-372
Submitral ventricular aneurysm is a thoroughly studied pathology but is not well known due to its rarity. Clinically, it is manifested by symptoms and signs of heart failure, mitral regurgitation and/or ventricular arrhythmias, and may be associated with thromboembolic phenomena and myocardial ischemia due to compression of the coronary arteries by the aneurysm. A rare complication of this type of aneurysm is rupture into the left atrium. Transthoracic echocardiography plays an important role in the definitive diagnosis of this pathology, although the role of transesophageal echocardiography in the evaluation of these patients is less known. We report a case of a submitral ventricular aneurysm complicated by rupture into the left atrium, which was diagnosed by transesophageal echocardiography. 相似文献
8.
9.
10.