全文获取类型
收费全文 | 18278篇 |
免费 | 1687篇 |
国内免费 | 79篇 |
专业分类
耳鼻咽喉 | 275篇 |
儿科学 | 667篇 |
妇产科学 | 427篇 |
基础医学 | 2322篇 |
口腔科学 | 537篇 |
临床医学 | 1381篇 |
内科学 | 3945篇 |
皮肤病学 | 643篇 |
神经病学 | 1023篇 |
特种医学 | 728篇 |
外国民族医学 | 9篇 |
外科学 | 3108篇 |
综合类 | 204篇 |
一般理论 | 5篇 |
预防医学 | 1376篇 |
眼科学 | 462篇 |
药学 | 1523篇 |
中国医学 | 101篇 |
肿瘤学 | 1308篇 |
出版年
2023年 | 157篇 |
2022年 | 504篇 |
2021年 | 801篇 |
2020年 | 516篇 |
2019年 | 767篇 |
2018年 | 989篇 |
2017年 | 666篇 |
2016年 | 719篇 |
2015年 | 635篇 |
2014年 | 881篇 |
2013年 | 1208篇 |
2012年 | 1402篇 |
2011年 | 1483篇 |
2010年 | 964篇 |
2009年 | 844篇 |
2008年 | 947篇 |
2007年 | 925篇 |
2006年 | 868篇 |
2005年 | 735篇 |
2004年 | 683篇 |
2003年 | 489篇 |
2002年 | 449篇 |
2001年 | 327篇 |
2000年 | 349篇 |
1999年 | 263篇 |
1998年 | 106篇 |
1997年 | 84篇 |
1996年 | 78篇 |
1995年 | 51篇 |
1994年 | 52篇 |
1993年 | 54篇 |
1992年 | 49篇 |
1991年 | 62篇 |
1990年 | 50篇 |
1989年 | 47篇 |
1988年 | 50篇 |
1987年 | 38篇 |
1986年 | 21篇 |
1985年 | 39篇 |
1984年 | 87篇 |
1983年 | 74篇 |
1982年 | 47篇 |
1981年 | 29篇 |
1980年 | 46篇 |
1979年 | 60篇 |
1978年 | 49篇 |
1977年 | 39篇 |
1976年 | 38篇 |
1975年 | 47篇 |
1974年 | 28篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
Abd-Allah H. El Ashmawy Kathleen Dowson Ahmed El-Bakoury Hazem A.H. Hosny Rathan Yarlagadda Jonathan Keenan 《The Journal of arthroplasty》2021,36(3):816-822.e1
BackgroundTotal hip and knee arthroplasties are increasingly performed operations, and routine follow-up places huge demands on orthopedic services. This study investigates the effectiveness, patients’ satisfaction, and cost reduction of Virtual Joint Replacement Clinic (VJRC) follow-up of total hip arthroplasty and total knee arthroplasty patients in a university hospital. VJRC is especially valuable when in-person appointments are not advised or feasible such as during the COVID-19 pandemic.MethodsA total of 1749 patients who were invited for VJRC follow-up for knee or hip arthroplasty from January 2017 to December 2018 were included in this retrospective study. Patients were referred to VJRC after their 6-week postoperative review. Routine VJRC postoperative review was undertaken at 1 and 7 years and then 3-yearly thereafter. We evaluated the VJRC patient response rate, acceptability, and outcome. Patient satisfaction was measured in a subgroup of patients using a satisfaction survey. VJRC costs were calculated compared to face-to-face follow-up.ResultsThe VJRC had a 92.05% overall response rate. Only 7.22% required further in-person appointments with only 3% being reviewed by an orthopedic consultant. VJRC resulted in an estimated saving of £42,644 per year at our institution. The patients’ satisfaction survey showed that 89.29% of the patients were either satisfied or very satisfied with VJRC follow-up.ConclusionVJRC follow-up for hip and knee arthroplasty patients is an effective alternative to in-person clinic assessment which is accepted by patients, has high patient satisfaction, and can reduce the cost to both health services and patients. 相似文献
2.
3.
4.
5.
Marta López-Fauqued Laura Campora Frédérique Delannois Mohamed El Idrissi Lidia Oostvogels Ferdinandus J. De Looze Javier Diez-Domingo Thomas C. Heineman Himal Lal Janet E. McElhaney Shelly A. McNeil Wilfred Yeo Fernanda Tavares-Da-Silva 《Vaccine》2019,37(18):2482-2493
Background
The ZOE-50 (NCT01165177) and ZOE-70 (NCT01165229) phase 3 clinical trials showed that the adjuvanted recombinant zoster vaccine (RZV) was ≥90% efficacious in preventing herpes zoster in adults. Here we present a comprehensive overview of the safety data from these studies.Methods
Adults aged ≥50 (ZOE-50) and ≥70 (ZOE-70) years were randomly vaccinated with RZV or placebo. Safety analyses were performed on the pooled total vaccinated cohort, consisting of participants receiving at least one dose of RZV or placebo. Solicited and unsolicited adverse events (AEs) were collected for 7 and 30?days after each vaccination, respectively. Serious AEs (SAEs) were collected from the first vaccination until 12?months post-last dose. Fatal AEs, vaccination-related SAEs, and potential immune-mediated diseases (pIMDs) were collected during the entire study period.Results
Safety was evaluated in 14,645 RZV and 14,660 placebo recipients. More RZV than placebo recipients reported unsolicited AEs (50.5% versus 32.0%); the difference was driven by transient injection site and solicited systemic reactions that were generally seen in the first week post-vaccination. The occurrence of overall SAEs (RZV: 10.1%; Placebo: 10.4%), fatal AEs (RZV: 4.3%; Placebo: 4.6%), and pIMDs (RZV: 1.2%; Placebo: 1.4%) was balanced between groups. The occurrence of possible exacerbations of pIMDs was rare and similar between groups. Overall, except for the expected local and systemic symptoms, the safety results were comparable between the RZV and Placebo groups irrespective of participant age, gender, or race.Conclusions
No safety concerns arose, supporting the favorable benefit-risk profile of RZV. 相似文献6.
7.
8.
9.
10.
Gianluca Gambarini Lucila Piasecki Gabriele Miccoli Gianfranco Gaimari Roberto Di Giorgio Dario Di Nardo Adham A Azim Luca Testarelli 《Australian endodontic journal : the journal of the Australian Society of Endodontology Inc》2019,45(2):154-162
This study evaluated the effect of new motions of the motor TriAuto ZX2 on the cyclic fatigue of endodontic instruments. Vortex Blue 35.06 instruments were divided into four groups (n = 10) and tested for fatigue in a curved artificial canal (90° and 2 mm radius) using the following motions: continuous rotation (CR), Optimum Torque Reverse (OTR) set at 180° and the Optimum Glide Path (OGP), which was tested at 90° and 240°. The time to fracture (TTF) and the lengths of the fractured fragments were recorded. The mean TTF was significantly different among the groups (anova , P < 0.05): OGP 90° (213.39 ± 27.45), OTR 180° (121.24 ± 17.03), OGP 240° (45.24 ± 5.61) and CR (8.43 ± 1.27). Weibull analysis confirmed the shortest life expectancy for CR and the longest survival for OGP at 90°. The resistance to fatigue was affected by motions and pre‐set angles. The proprietary movements that are currently available for endodontic instruments were classified according to their kinematics. 相似文献