全文获取类型
收费全文 | 3194篇 |
免费 | 180篇 |
国内免费 | 29篇 |
专业分类
耳鼻咽喉 | 38篇 |
儿科学 | 197篇 |
妇产科学 | 45篇 |
基础医学 | 410篇 |
口腔科学 | 179篇 |
临床医学 | 270篇 |
内科学 | 705篇 |
皮肤病学 | 79篇 |
神经病学 | 101篇 |
特种医学 | 505篇 |
外科学 | 252篇 |
综合类 | 32篇 |
一般理论 | 1篇 |
预防医学 | 243篇 |
眼科学 | 24篇 |
药学 | 188篇 |
中国医学 | 15篇 |
肿瘤学 | 119篇 |
出版年
2023年 | 17篇 |
2022年 | 57篇 |
2021年 | 88篇 |
2020年 | 57篇 |
2019年 | 60篇 |
2018年 | 101篇 |
2017年 | 59篇 |
2016年 | 62篇 |
2015年 | 76篇 |
2014年 | 90篇 |
2013年 | 154篇 |
2012年 | 176篇 |
2011年 | 156篇 |
2010年 | 135篇 |
2009年 | 116篇 |
2008年 | 113篇 |
2007年 | 96篇 |
2006年 | 91篇 |
2005年 | 72篇 |
2004年 | 70篇 |
2003年 | 56篇 |
2002年 | 79篇 |
2001年 | 41篇 |
2000年 | 59篇 |
1999年 | 51篇 |
1998年 | 136篇 |
1997年 | 123篇 |
1996年 | 128篇 |
1995年 | 94篇 |
1994年 | 79篇 |
1993年 | 81篇 |
1992年 | 33篇 |
1991年 | 26篇 |
1990年 | 24篇 |
1989年 | 67篇 |
1988年 | 51篇 |
1987年 | 57篇 |
1986年 | 51篇 |
1985年 | 53篇 |
1984年 | 25篇 |
1983年 | 33篇 |
1982年 | 36篇 |
1981年 | 21篇 |
1980年 | 36篇 |
1979年 | 18篇 |
1978年 | 16篇 |
1977年 | 17篇 |
1976年 | 23篇 |
1975年 | 24篇 |
1971年 | 4篇 |
排序方式: 共有3403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.
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
4.
JA HYEON KU CHEOL KWAK SEUNG-JUNE OH EUNSIK LEE SANG EUN LEE JAE-SEUNG PAICK 《International journal of urology》2004,11(7):489-493
BACKGROUND: Our aims in the present study were to estimate the influences of pain and urinary symptoms on quality of life, and to determine which of these two variables has the most predictive power with respect to quality of life in young men with chronic prostatitis-like symptoms. METHODS: Chronic prostatitis-like symptoms were measured by the National Institutes of Health-Chronic Prostatitis Symptom Index. Of the 28,841 men aged 20 years who lived in the study community, 18,495 men (a response rate 64.1%) agreed to participate in the study. A total of 1057 men who complained of symptoms indicative of chronic prostatitis were included in the study. The influences of pain and urinary symptoms on quality of life were determined using logistic regression analysis. The receiver operating characteristic (ROC) curve was used to estimate the predictive ability of each of these variables with respect to quality of life. RESULTS: Results from multivariate analysis showed that both pain and urinary symptoms were associated with an increased likelihood of impaired quality of life, although pain contributed more to a reduced quality of life than urinary symptoms. Relative to men who experienced mild pain, men who experienced moderate pain had a 3.9-fold risk of poor quality of life (odds ratio [OR], 3.87; 95% confidence interval [CI], 2.86-5.23; P < 0.001) and those who experienced severe pain had a 15.7-fold risk of reduced quality of life (OR, 15.68; 95% CI, 6.59-37.35; P < 0.001). Moderate urinary symptoms were associated with a 1.4-fold risk of bother (OR, 1.41; 95% CI, 1.01-1.99; P < 0.001) and severe urinary symptoms were associated with 2.4-fold risk (OR, 2.39; 95% CI, 1.37-4.12; P < 0.001), relative to mild urinary symptoms. Comparison of the effects of pain and urinary symptoms showed that pain severity had the most predictive power for bother, quality of life, and quality-of-life impact. The areas under the ROC curves for bother, quality of life, and quality-of-life impact were 71.3%, 69.3% and 72.5%, respectively. CONCLUSION: Urinary symptoms and pain might be associated with an increased likelihood of impaired quality of life in young men with chronic prostatitis-like symptoms. In addition, our findings suggest that pain severity is the most influential variable for determining quality of life in this population. 相似文献
5.
6.
7.
8.
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
9.
10.