全文获取类型
收费全文 | 25959篇 |
免费 | 1594篇 |
国内免费 | 148篇 |
专业分类
耳鼻咽喉 | 312篇 |
儿科学 | 661篇 |
妇产科学 | 546篇 |
基础医学 | 3834篇 |
口腔科学 | 1253篇 |
临床医学 | 2229篇 |
内科学 | 6155篇 |
皮肤病学 | 684篇 |
神经病学 | 2307篇 |
特种医学 | 507篇 |
外科学 | 2625篇 |
综合类 | 77篇 |
一般理论 | 12篇 |
预防医学 | 2417篇 |
眼科学 | 392篇 |
药学 | 1984篇 |
中国医学 | 184篇 |
肿瘤学 | 1522篇 |
出版年
2024年 | 34篇 |
2023年 | 332篇 |
2022年 | 740篇 |
2021年 | 1299篇 |
2020年 | 690篇 |
2019年 | 990篇 |
2018年 | 1136篇 |
2017年 | 726篇 |
2016年 | 806篇 |
2015年 | 952篇 |
2014年 | 1208篇 |
2013年 | 1585篇 |
2012年 | 2201篇 |
2011年 | 2341篇 |
2010年 | 1262篇 |
2009年 | 989篇 |
2008年 | 1545篇 |
2007年 | 1551篇 |
2006年 | 1358篇 |
2005年 | 1198篇 |
2004年 | 975篇 |
2003年 | 846篇 |
2002年 | 801篇 |
2001年 | 273篇 |
2000年 | 249篇 |
1999年 | 234篇 |
1998年 | 129篇 |
1997年 | 120篇 |
1996年 | 65篇 |
1995年 | 60篇 |
1994年 | 69篇 |
1993年 | 45篇 |
1992年 | 109篇 |
1991年 | 69篇 |
1990年 | 76篇 |
1989年 | 58篇 |
1988年 | 45篇 |
1987年 | 34篇 |
1986年 | 39篇 |
1985年 | 39篇 |
1984年 | 27篇 |
1983年 | 27篇 |
1980年 | 26篇 |
1979年 | 20篇 |
1978年 | 25篇 |
1975年 | 21篇 |
1974年 | 25篇 |
1973年 | 28篇 |
1971年 | 24篇 |
1969年 | 19篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
Marta Rozanski Valentin Neuhaus Emily Thornton Stéphanie J. E. Becker James P. Rathmell David Ring 《Journal of hand and microsurgery》2015,7(1):30-35
This study used the National Survey of Ambulatory Surgery (NSAS) database to measure the incidence of and risk factors for symptoms in the ambulatory surgery center and problems within 24 h after isolated carpal tunnel release (CTR). The NSAS contained records on 400,000 adult patients with carpal tunnel syndrome who were treated with CTR in 2006, based on ICD-9 codes. The type of anesthesia used and factors associated with symptoms and problems were sought in bivariate and multivariable statistical analyses. The mean duration of the procedure was 16 ± 8.8 min. Only 5 % were performed under local anesthesia without sedation, 45 % with IV sedation, 28 % regional anesthesia, and 19 % general anesthesia. Symptoms in the ambulatory surgery center or a problem within 24 h after discharge were recorded in 10 % of patients, all of them minor and transient, including difficulties with pain and its treatment. The strongest risk factors were male sex, age of 45 years and older, and participation of an anesthesiologist. Local anesthesia and regional anesthesia were associated with more perioperative symptoms and postoperative problems. Most CTR are performed with some sedation in the United States. CTR is a safe procedure: one in 10 patients will experience a minor issue in the perioperative or immediate postoperative period. 相似文献
2.
3.
Iclea Rocha Gama Euclides Marinho Trindade-Filho Suzana Lima Oliveira Nassib Bezerra Bueno Isabelle Tenório Melo Cyro Rego Cabral-Junior Elenita M. Barros Jaqueline A. Galvão Wanessa S. Pereira Raphaela C. Ferreira Bruna R. Domingos Terezinha da Rocha Ataide 《Metabolic brain disease》2015,30(1):93-98
4.
Adilson Cunha Ferreira Edward Araujo Júnior Wellington P. Martins João Francisco Jordão Antônio Hélio Oliani Simon E. Meagher 《The journal of maternal-fetal & neonatal medicine》2015,28(14):1706-1710
Objective: To assess the quality of images and video clips of fetal central nervous (CNS) structures obtained by ultrasound and transmitted via tele-ultrasound from Brazil to Australia.Methods: In this cross-sectional study, 15 normal singleton pregnant women between 20 and 26 weeks were selected. Fetal CNS structures were obtained by images and video clips. The exams were transmitted in real-time using a broadband internet and an inexpensive video streaming device. Four blinded examiners evaluated the quality of the exams using the Likert scale. We calculated the mean, standard deviation, mean difference, and p values were obtained from paired t tests.Results: The quality of the original video clips was slightly better than that observed by the transmitted video clips; mean difference considering all observers = 0.23 points. In 47/60 comparisons (78.3%; 95% CI?=?66.4–86.9%) the quality of the video clips were judged to be the same. In 182/240 still images (75.8%; 95% CI?=?70.0–80.8%) the scores of transmitted image were considered the same as the original.Conclusion: We demonstrated that long distance tele-ultrasound transmission of fetal CNS structures using an inexpensive video streaming device provided images of subjective good quality. 相似文献
5.
6.
Accuracy evaluation of image registration and segmentation tools used in conformal treatment planning of prostate cancer. 总被引:1,自引:0,他引:1
Stefania Pallotta Marta Bucciolini Serenella Russo Cinzia Talamonti Talamonti Cinzia Giampaolo Biti 《Computerized medical imaging and graphics》2006,30(1):1-7
Segmentation and registration tools are commonly used in radiotherapy for target and at risk organs localisation. In this work the performances of three different segmentation tools and of a surface matching registration technique, used on computed tomography (CT) and magnetic resonance (MR) images for the treatment planning of conformal prostate carcinoma, are studied. The accuracy of the segmentation and registration tools was evaluated by phantom experiment and on patient data, respectively. A preliminary estimate of MR image distortion was also performed. 相似文献
7.
Magdalena Cortes Alessandro Lambiase Marta Sacchetti Silvia Aronni Stefano Bonini 陈旭 《美国医学会眼科杂志(中文版)》2006,18(1):30-32
泪管-耳-牙-指(趾)(LADD)综合征是一种具有多种表现的常染色体显性遗传疾病。最初在1967年由Levy报道。1例双侧泪液系统缺失、杯状耳、干嘴,以及牙、手臂和指(趾)异常的单发病例。之后一些新发现的临床表现,如肾脏异常、唾液腺缺乏、先天性髋脱位、先天性裂孔疝和横膈疝、感觉性耳聋和传导性耳聋、牙发育不全、四肢异常、口腔干燥和眼干都被报道与此综合征有关。 相似文献
8.
9.
Successful efforts in improving breastfeeding initiation rates at an urban teaching hospital prompted the hospital to create a lactation consultant (LC) position in the outpatient setting to focus on breastfeeding duration. This article reviews the complexity of the clinic setting, with the challenges and benefits of the consultant's first year in one of the hospital's outpatient clinics. Preliminary data collected by the consultant suggest that patients counseled by the LC in the outpatient clinic setting have longer breastfeeding duration rates. 相似文献
10.