全文获取类型
收费全文 | 92001篇 |
免费 | 6539篇 |
国内免费 | 1981篇 |
专业分类
耳鼻咽喉 | 645篇 |
儿科学 | 1139篇 |
妇产科学 | 736篇 |
基础医学 | 4829篇 |
口腔科学 | 1358篇 |
临床医学 | 9852篇 |
内科学 | 7592篇 |
皮肤病学 | 1067篇 |
神经病学 | 4135篇 |
特种医学 | 2199篇 |
外国民族医学 | 8篇 |
外科学 | 5164篇 |
综合类 | 20553篇 |
现状与发展 | 5篇 |
一般理论 | 2篇 |
预防医学 | 9722篇 |
眼科学 | 957篇 |
药学 | 16476篇 |
598篇 | |
中国医学 | 9346篇 |
肿瘤学 | 4138篇 |
出版年
2024年 | 243篇 |
2023年 | 1375篇 |
2022年 | 2945篇 |
2021年 | 4012篇 |
2020年 | 4084篇 |
2019年 | 2890篇 |
2018年 | 2751篇 |
2017年 | 3371篇 |
2016年 | 4099篇 |
2015年 | 3812篇 |
2014年 | 9411篇 |
2013年 | 8363篇 |
2012年 | 7728篇 |
2011年 | 7294篇 |
2010年 | 5471篇 |
2009年 | 4223篇 |
2008年 | 3826篇 |
2007年 | 3760篇 |
2006年 | 3127篇 |
2005年 | 2453篇 |
2004年 | 1857篇 |
2003年 | 1647篇 |
2002年 | 1357篇 |
2001年 | 1190篇 |
2000年 | 992篇 |
1999年 | 840篇 |
1998年 | 680篇 |
1997年 | 574篇 |
1996年 | 501篇 |
1995年 | 484篇 |
1994年 | 436篇 |
1993年 | 341篇 |
1992年 | 320篇 |
1991年 | 289篇 |
1990年 | 262篇 |
1989年 | 272篇 |
1988年 | 244篇 |
1987年 | 204篇 |
1986年 | 202篇 |
1985年 | 325篇 |
1984年 | 365篇 |
1983年 | 284篇 |
1982年 | 311篇 |
1981年 | 253篇 |
1980年 | 206篇 |
1979年 | 216篇 |
1978年 | 153篇 |
1977年 | 122篇 |
1976年 | 114篇 |
1975年 | 103篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
目的:总结典型国家基层卫生服务提供中实现医防整合的经验,为我国基层医疗卫生服务整合提供借鉴。方法:本研究方法为文献研究。结果:在个人层面,英国、泰国、古巴培养全科医生作为"守门人"并将其作为提供医防整合服务的主体;在机构层面,各国基层机构组成服务网络,内部强调跨学科合作;在体系层面,通过横向合作和有序的首诊与转诊协调服务;国家立法保障和健康保险筹资等引导支持基层医疗卫生服务整合。结论:培养和配置高质量的医防一体的全科医生、促进机构跨学科融合、通过立法和筹资体系予以保障是各国提供基层整合型服务的核心,值得我国基层医防服务整合借鉴。 相似文献
42.
43.
目的探讨不同手术方法治疗复杂胫骨平台骨折临床疗效。方法选择2016年1月—2018年12月84例复杂胫骨平台骨折患者,随机分组。单侧锁定钢板内固定组选择单侧锁定钢板内固定手术,双侧切口双侧解剖钢板内固定组选择双侧切口双侧解剖钢板内固定。分析手术操作时间、手术失血、平均住院天数以及复杂胫骨平台骨折愈合时间;治疗前后患者视觉模拟评分和Rasmussen膝关节功能评分;膝关节僵硬发生率。结果双侧切口双侧解剖钢板内固定组视觉模拟评分和Rasmussen膝关节功能评分、手术操作时间、手术失血、平均住院天数以及复杂胫骨平台骨折愈合时间、膝关节僵硬发生率和单侧锁定钢板内固定组比较有优势,P<0.05。结论复杂胫骨平台骨折患者实施双侧切口双侧解剖钢板内固定可获得较好效果。 相似文献
44.
Mariano E. Menendez Suleiman Y. Sudah Patrick J. Denard 《Seminars in Arthroplasty》2022,32(3):644-649
BackgroundThe growing enthusiasm for the use of reverse shoulder arthroplasty (RSA) in the treatment of primary glenohumeral osteoarthritis (GHOA) with an intact rotator cuff is based on data derived from single-center studies with limited generalizability and follow-up. This study compared patient-reported outcomes (PROs) between RSA and total shoulder arthroplasty (TSA) for the treatment of primary GHOA with up to 5-year follow-up and examined temporal trends in the treatment of GHOA between 2012 and 2021.MethodsA retrospective review was performed on patients with primary GHOA undergoing primary arthroplasty surgery from the Surgical Outcomes System global registry between 2012 and 2021. PROs including the American Shoulder and Elbow Surgeons (ASES) score, Single Assessment Numeric Evaluation (SANE) score, and visual analog scale (VAS) for pain were compared between RSA and TSA at 1, 2, and 5 years postoperatively.ResultsA total of 4451 patients were included, with 2693 (60.5%) undergoing TSA and 1758 (39.5%) undergoing RSA. Both RSA and TSA provided clinically excellent outcomes at 1 year postoperatively (ASES: 80.8 ± 17.9 vs. 85.9 ± 15.2, respectively; SANE: 74.8 ± 24.7 vs. 79.5 ± 22.9; VAS pain: 1.3 ± 2.0 vs. 1.1 ± 1.7; all P < .05) that were maintained at 2 years (ASES: 81.3 ± 19.3 vs. 87.3 ± 14.9; SANE: 74.8 ± 26.2 vs. 79.7 ± 24.7; VAS pain: 1.3 ± 2.1 vs. 1.0 ± 1.6; all P < .05) and 5 years (ASES: 81.7 ± 16.5 vs. 86.9 ± 15.3; SANE: 71.6 ± 28.5 vs. 78.2 ± 25.9; VAS pain: 1.0 ± 1.7 vs. 1.0 ± 1.7; all P < .05), with statistical significance favoring TSA. After controlling for age and sex, there was an adjusted difference of 4.5 units in the ASES score favoring TSA (P = .005) at 5 years postoperatively but no differences in adjusted SANE (P = .745) and VAS pain (P = .332) scores. The use of RSA for GHOA grew considerably over time, from representing only 17% of all replacements performed for GHOA in 2012 to nearly half (47%) in 2021 (P < .001).ConclusionRSA as a treatment for GHOA with an intact rotator cuff seems to yield PROs that are largely clinically equivalent to TSA extending to 5 years postoperatively. The observed statistical significance favoring TSA appears to be of marginal clinical benefit based on established minimal clinically important differences and may be a result of the large sample size. Further research using more granular clinical data and examining differences in range of motion and complications is warranted as it may change the value analysis. 相似文献
45.
Objectives:To reassess the long-term camouflage effects of resin infiltration (Icon, DMG, Hamburg, Germany) of white spot lesions (WSL) and sound adjacent enamel (SAE) achieved in a previous trial. The null hypothesis was tested that there were no significantly different CIE-L*a*b*-ΔE-values between WSL and SAE areas of assessment after at least 24 months (T24) compared to those at baseline (T0).Materials and Methods:Of twenty subjects who received previous resin infiltration treatment of nteeth = 111 nonrestored, noncavitated postorthodontic WSL after multibracket treatment during a randomized controlled trial and were contacted 20 months after baseline, eight subjects (trial teeth nteeth = 40; m/f ratio 1/7; age range (mean; SD) 12–17 [15.25; 2.12] years); response rate: 40%) were available for follow-up after at least 24 months (T24). CIE-L*a*b* differences between summarized color and lightness values (ΔEWSL/SAE) of WSL and SAE were assessed using a spectrophotometer and compared to baseline data assessed prior to infiltration (T0), and those after 6 (T6), and 12 (T12) months using paired t tests at a significance level of α = 5%.Results:T24 assessments were performed after a mean 33.86 (SD: 8.64; Min: 24; Max: 45) months following T0. Mean (SD) ΔEWSL/SAE units of available teeth were 8.76 (5.33) at baseline; 5.5 (2.75) at T6; 5.2 (2.41) at T12; and 5.57 (2.6) at T24. Comparisons of T6, T12, and T24 with T0 yielded highly significant differences, whereas T6–T24 and T12–T24 differences were found to be not significant.Conclusions:Assimilation of infiltrated WSL to the color of adjacent enamel by resin infiltration is considered to be suitable for the long-term improvement in the esthetic appearance of postorthodontic WSL. 相似文献
46.
47.
《Radiography》2021,27(4):1094-1098
IntroductionEducation and training strategies in Therapeutic Radiography are challenged in recruiting and retaining students in the profession. Clinical oncology centres are often viewed as stressful environments for students due to rapid advances in technology and reported bullying and harassment. Educators continue to work with clinical partners in developing strategies to promote resilience and reduce negative attitudes. The overall aim of this project was to explore the use of Triple R sessions as a new method of student reflection.MethodsThe Review, Reflect and Re-focus (Triple R) sessions were designed to enable students to learn from their clinical experiences and; apply their understanding and positivity when they return to clinical placement. Eleven sessions were completed across 7 student cohorts in one academic year. Qualitative data was collected from feedback forms, as well as academic field notes, and analysed thematically.ResultsTwo main themes focused on: (1) staff interactions and (2) student expectations. Results showed that Triple R sessions were helpful in drawing out the experiences of students in a positive way to reflect on their own development. The sessions enabled critical self-analysis and improved problem-solving skills, particularly evident during peer discussions.ConclusionTriple R sessions explored the influence of a positive approach on students' perceptions of their overall placement. Evaluation of the data indicated that, following academic and peer discussion, students' perceptions tended to be a more positive overall view of their placement.Implications for practiceTriple R sessions can be used in academic and clinical environments to enable positive student interactions. 相似文献
48.
49.
50.