全文获取类型
收费全文 | 1625篇 |
免费 | 75篇 |
国内免费 | 3篇 |
专业分类
耳鼻咽喉 | 13篇 |
儿科学 | 34篇 |
妇产科学 | 13篇 |
基础医学 | 109篇 |
口腔科学 | 34篇 |
临床医学 | 285篇 |
内科学 | 204篇 |
皮肤病学 | 9篇 |
神经病学 | 63篇 |
特种医学 | 22篇 |
外科学 | 72篇 |
综合类 | 265篇 |
预防医学 | 443篇 |
眼科学 | 6篇 |
药学 | 89篇 |
1篇 | |
中国医学 | 23篇 |
肿瘤学 | 18篇 |
出版年
2023年 | 21篇 |
2022年 | 58篇 |
2021年 | 69篇 |
2020年 | 68篇 |
2019年 | 63篇 |
2018年 | 45篇 |
2017年 | 39篇 |
2016年 | 52篇 |
2015年 | 59篇 |
2014年 | 99篇 |
2013年 | 112篇 |
2012年 | 85篇 |
2011年 | 108篇 |
2010年 | 78篇 |
2009年 | 87篇 |
2008年 | 93篇 |
2007年 | 69篇 |
2006年 | 59篇 |
2005年 | 35篇 |
2004年 | 35篇 |
2003年 | 17篇 |
2002年 | 24篇 |
2001年 | 13篇 |
2000年 | 11篇 |
1999年 | 13篇 |
1998年 | 7篇 |
1997年 | 4篇 |
1996年 | 11篇 |
1995年 | 4篇 |
1994年 | 6篇 |
1993年 | 2篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 9篇 |
1986年 | 17篇 |
1985年 | 12篇 |
1984年 | 19篇 |
1983年 | 23篇 |
1982年 | 24篇 |
1981年 | 14篇 |
1980年 | 13篇 |
1979年 | 19篇 |
1978年 | 20篇 |
1977年 | 21篇 |
1976年 | 31篇 |
1975年 | 19篇 |
1974年 | 9篇 |
1973年 | 1篇 |
排序方式: 共有1703条查询结果,搜索用时 15 毫秒
1.
2.
Camila Padilha Barbosa Rosalie Barreto Belian Cláudia Marina Tavares de Araújo 《Jornal de pediatria》2021,97(1):80-87
ObjectiveTo present, the process of development and evaluation of an educational software on the Child Health Handbook proposed for the continuing education of primary care nurses and physicians.MethodsQuantitative study of methodological development. For software development, the following steps were followed: definition of objectives; determination of the target audience; choice of pedagogical and theoretical reference for content; content selection and structuring; software development and evaluation by experts (five nurses and four physicians). All responded to an instrument that included four domains: pedagogical; content; functionality; system presentation and usability. The evaluation criteria were arranged on a Likert-type scale. The percentage of agreement and Content Validity Index were used for the quantitative analysis of the degree of agreement, considering a Content Validity Index cutoff point equal to 0.80.ResultsThe overall agreement index, calculated by the arithmetic mean of the Contents Validity Index of the evaluated domains, was 0.96, with scores ranging from 0.90 to 1.00. The average percentage of agreement of the experts per domain was 92.86%, with lower agreement in the content (80.95%), presentation, and usability (90.48%) domains. 100% of percentage of agreement was observed in the pedagogical and functionality domains among the evaluated specialists.ConclusionThe percentage of agreement, Content Validity Index and overall agreement index of the Child Health Handbook educational software in the context of primary care disclosed the software adequacy as an educational resource for continuing education of primary care nurses and physicians. Considering the assessed dimensions, it can also be used by other health professionals and undergraduate students. 相似文献
3.
《Journal of Medical Imaging and Radiation Sciences》2020,51(1):173-181
IntroductionThis study aims to construct learning curves related to the realization of standardized postprocessing by radiographer students and to discuss their exploitation and interest.Materials and MethodsThis study was carried out in 21 French students in their 3rd year of training. Two postprocessing protocols in CT (#1 traumatic shoulder; #2 petrous bone) were repeated 15 times by each student. Each achievement was timed to obtain overall learning curves. The realization accuracy was also assessed for each student at each repetition.ResultsThe learning rates for the two protocols are 63% and 56%, respectively. The number of repetitions to reach the reference time for each protocol is 11 and 12, respectively. In both protocols, the standard deviations are significantly reduced and stabilized during repetitions. The mean accuracy progresses more quickly in protocol #1.DiscussionThe measured learning rates reflect a rapid learning process for each protocol. The analysis of the standard deviations shows that students have reached a homogeneous level. The average times and accuracies measured during the last repetitions show that the group has reached a high level of performance. Building learning curves helps students measure their progress and motivates them.ConclusionObtaining learning curves allows trainers/supervisors to qualify the learning difficulty of a task while motivating students/radiographers. The use of learning curves is inline with the competency-based training paradigm. 相似文献
4.
关于高等医学教育管理体制与学制改革的思考 总被引:9,自引:1,他引:8
高等医学教育管理体制与学制改革是二十一世纪社会发展的需要。文章阐述了医学教育小规模、长学制、高投入的基本特征,强调了遵循医学教育规律的重要性,分析了医学院在综合性大学的重要地位,医学院与附属医院以及相关院系的关系。文章还依据社会发展的需要和医学教育国际化的趋势,分析了医学教育学制调整的必要性以及学制调整思路。 相似文献
5.
6.
本文依据三种现代教育理论思想的有益启示,围绕医学高等专科学校课堂教学质量的提升问题,提出以加强教育理论思想研修为突破口,进而采取更新教育观念、狠抓移植应用和改进教法学法来有效提高医学高等专科学校课堂教学质量的新思路。 相似文献
7.
《The Knee》2021
BackgroundAs knee osteotomy surgery becomes increasingly accessible, more patients may turn to the Internet for information. This study examined the source, quality, content and readability of online information regarding osteotomy around the knee.MethodsThe first 70 websites returned by the top four search engines were identified using the key words: “knee osteotomy” and “high tibial osteotomy.” The websites were categorised by type and assessed using the DISCERN score, Journal of the American Medical Association (JAMA) benchmark criteria and a novel Knee Osteotomy-Specific Score (KOSS). The presence of the Health On the Net (HON) code accreditation seal was noted. Readability of each website was assessed using eight readability formulae. The mean reading grade level (RGL) was compared to the 6th and 8th grade reading levels. The mean RGL of each category was also compared.ResultsOf the 45 unique websites analysed, the majority were Physician (33%) and Journal websites (31%). The mean DISCERN score was 36.7 (±8.9) which is classified as ‘poor.’ The mean JAMA benchmark criteria score was 2.04 (±1.5) and Physician websites were most likely to be scored zero. The mean KOSS was 15.4 (±5.7). The highest scoring website was a Commercial site but, overall, Journal category sites provided the best quality information. Websites that bore the HONcode seal obtained higher DISCERN, JAMA benchmark criteria and Knee Osteotomy - Specific Scores.The cumulative mean RGL was 13.2 (±2.2) which exceeded the 6th grade level by an average of 7.2 grade levels and the 8th grade level by an average of 5.2 grade levels. No website (0%) was written at or below either the 6th or the 8th grade reading levels. The mean Flesch Reading Ease Score of all websites was 41.13 (±14.7) which is classified as ‘difficult.’ Journal websites had the highest RGL.ConclusionThe information available online regarding osteotomy around the knee varies tremendously in quality and completeness. Physician sites predominate, but these were among the lowest scoring of all websites. Even where high quality information is available, it is set at too high a level to be easily understood.Level of evidenceSurvey of materials – Internet. 相似文献
8.
9.
This paper examines the difficulty and discrimination capacity of several subjects for problematic students, i.e., those failing repeatedly (re-examined four or more times) in at least one subject. Four hundred and six problematic students were analysed. The difficulty in passing thirty-one mandatory subjects was assessed in two ways:
- 1 on the basis of the attrition rate of the students due to pass the subject,
- 2 on the basis of the percentage of number of failures over the number of examinations.
10.
The intestinal ecosystem in chronic functional constipation 总被引:3,自引:0,他引:3
G Zoppi M Cinquetti A Luciano A Benini A Muner E Bertazzoni Minelli 《Acta paediatrica (Oslo, Norway : 1992)》1998,87(8):836-841
Chronic functional constipation is common in infants, and the bacterial composition of stools in this condition is not known. The study aims were to: (i) investigate the composition of the intestinal ecosystem in chronic functional constipation; (ii) establish whether the addition of the water-holding agent calcium polycarbophil to the diet induces an improvement in constipation; and (iii) determine the composition of the intestinal ecosystem after the use of this agent. In total, 42 children (20F, 22M; mean age: 8.6±2.9y) were studied. Twenty-eight children with functional chronic constipation without anatomical disorders were treated double-blind in random sequence for 1 month with an oral preparation of calcium polycarbophil (0.62g /twice daily) or placebo. Intestinal flora composition was evaluated by standard microbiological methods and biochemical assays on faecal samples collected before and after treatment. Fourteen healthy children were studied as controls. The results show that (i) the constipated children presented a significant increase in clostridia and bifidobacteria in faeces compared to healthy subjects-different species of clostridia and enterobacteriaceae were frequently isolated; no generalized overgrowth was observed; Clostridia outnumbered bacteroides and E. coli mean counts by 2-3log, while bacteroides and E. coli counts were similar (5-6 log10/g fresh faeces); these intestinal disturbances could be defined as a dysbiosis, i.e. a quantitative alteration in the relative proportions of certain intestinal bacterial species. (ii) Clinical resolution of constipation was achieved only in 43% of treated children and an improvement in 21% (one bowel movement every 2 d). (iii) Calcium polycarbophil treatment induced no significant changes in the composition of the intestinal ecosystem, nor in blood chemistry parameters. 相似文献