全文获取类型
收费全文 | 1077篇 |
免费 | 50篇 |
国内免费 | 14篇 |
专业分类
教育 | 783篇 |
科学研究 | 163篇 |
体育 | 39篇 |
综合类 | 46篇 |
文化理论 | 3篇 |
信息传播 | 107篇 |
出版年
2023年 | 8篇 |
2022年 | 27篇 |
2021年 | 32篇 |
2020年 | 60篇 |
2019年 | 27篇 |
2018年 | 30篇 |
2017年 | 32篇 |
2016年 | 26篇 |
2015年 | 40篇 |
2014年 | 84篇 |
2013年 | 130篇 |
2012年 | 91篇 |
2011年 | 94篇 |
2010年 | 47篇 |
2009年 | 49篇 |
2008年 | 60篇 |
2007年 | 57篇 |
2006年 | 61篇 |
2005年 | 46篇 |
2004年 | 41篇 |
2003年 | 33篇 |
2002年 | 24篇 |
2001年 | 17篇 |
2000年 | 7篇 |
1999年 | 5篇 |
1998年 | 1篇 |
1997年 | 7篇 |
1996年 | 3篇 |
1995年 | 1篇 |
1991年 | 1篇 |
排序方式: 共有1141条查询结果,搜索用时 15 毫秒
1.
Allan J. Hicks Zoe L. Carwardine Mike J. Hallworth Eric S. Kilpatrick 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2021,31(1)
IntroductionIt is often quoted that 70% of clinical decisions are based on laboratory results, but the evidence to substantiate this claim is lacking. Since clinical guidelines aim to document best-practice decision making for specific disease conditions, inclusion of any laboratory test means that the best available evidence is recommending clinicians use it. Cardiovascular disease (CVD) is the world’s most common cause of mortality, so this study reviewed all CVD guidelines published by five national/international authorities to determine what proportion of them recommended laboratory testing.Materials and methodsFive leading CVD guidelines were examined, namely the European Society of Cardiology (ESC), the UK National Institute for Health and Clinical Excellence (NICE), the American College of Cardiology (ACC), the Australian Heart Foundation (AHF) and the Cardiac Society of Australia and New Zealand (CSANZ).ResultsA total of 101 guidelines were reviewed. Of the 33 individual ESC guidelines relating to CVD, 24/33 made a direct reference to the use of clinical laboratory tests in either diagnosis or follow-up treatment. The same applied to 15/20 of NICE guidelines, 24/32 from the ACC and 15/16 from the AHF/CSANZ. Renal function and blood count testing were the most recommended (39 and 26 times), with lipid, troponin and natriuretic peptide measurement advocated 25, 19 and 19 times respectively.ConclusionsThis study has shown that laboratory testing is advocated by between 73% and 94% of individual CVD guideline recommendations from five national/international authorities. This provides an index to assess the potential value of laboratory medicine to healthcare. 相似文献
2.
该文通过制定调查问卷,对湖南某高职院校在校的2018级、2019级临床医学专业学生毕业后的去向进行了抽样调查,了解了学生毕业后的去向以及影响学生就业的各类因素,以期为学生毕业提供正确的就业指导。 相似文献
3.
4.
5.
6.
Gulsah Kemer 《Counselor Education & Supervision》2020,59(1):74-92
Beginning and expert supervisors’ cognitions and cognitive structures were compared via concept mapping, a mixed methods design. Both beginning and expert supervisors reported a variety of cognitions representing developmental characteristics in 3 areas: assessment of supervisees, conceptualization and management of supervision, and supervisory relationship. 相似文献
7.
Impact and educational outcomes of a small group self‐directed teaching strategy in a clinical neuroscience curriculum 下载免费PDF全文
Thomas I. Nathaniel Jordan C. Gainey Jessica A. Williams Bianca L. Stewart Michael C. Hood Leanne E. Brechtel Rakiya V. Faulkner Jasmine S. Pendergrass Leigh‐Ann Black Scott K. Griffin Christopher E. Troup Jayne S. Reuben Asa C. Black Jr. 《Anatomical sciences education》2018,11(5):478-487
The complexity of the material being taught in clinical neuroscience within the medical school curriculum requires creative pedagogies to teach medical students effectively. Many clinical teaching strategies have been developed and are well described to address these challenges. However, only a few have been evaluated to determine their impact on the performance of students studying clinical neuroscience. Interactive, 2‐hour, self‐directed small‐group interactive clinical case‐based learning sessions were conducted weekly for 4 weeks to integrate concepts learned in the corresponding didactic lectures. Students in the small groups analyzed cases of patients suffering from neurological disease that were based on eight learning objectives that allowed them to evaluate neuroanatomical data and clinical findings before presenting their case analysis to the larger group. Students’ performances on the formative quizzes and summative tests were compared to those of first‐year medical students in the previous year for whom the self‐directed, small‐group interactive clinical sessions were not available. There was a significant improvement in the summative performance of first‐year medical students with self‐directed clinical case learning in the second year (Y2) of teaching clinical neuroscience (P < 0.05) when compared with first‐year students in the first year (Y1) for whom the self‐directed learning approach was not available. Student performance in the formative assessments between Y1 and Y2 was not significantly different (P = 0.803). A target of ≥70% student scoring above 80% in the final summative examination was met. The current study revealed evidence for the impact and educational outcomes of a self‐directed, clinical teaching strategy in a clinical neuroscience curriculum for first‐year medical students. Anat Sci Educ 11: 478–487. © 2017 American Association of Anatomists. 相似文献
8.
Sveva Longo Enricomaria Mormina Francesca Granata Domenico Mallamace Marcello Longo Silvia Capuani 《文物保护研究》2018,63(7):383-390
A modern approach to the diagnosis of artistic heritage makes use of non-destructive techniques which avoid damage to artworks or signs of interaction with the analytical technique used. For this reason, today, the employment of X-rays to study artistic heritage is quite widespread. Computed tomography (CT) Imaging was first used as specialized medical diagnostic tool in the early 1970s. Today, CT scanners have become more common, and non-destructive three-dimensional imaging has found an increasing number of uses in different areas such as materials research, geology, archaeology, and museum conservation. In this work, a new generation of clinical CT (based on the Dual Energy and multi-slice acquisition principle) is used to investigate an Egyptian wooden mummy board with a total acquisition time of 93.23 seconds and a voxel size of 0.078?×?0.078?×?1.5?mm. The use of two distinct techniques of image post-processing, the two-dimensional multi-planar reconstruction (MPR) and the three-dimensional volume rendering technique (VRT) allowed us to: evaluate the state of conservation of the mummy board, determine how the wooden object was implemented, recognize a nineteenth-century intervention of consolidation, and advance the hypothesis that the wooden planks were reused. In particular, we highlight the use of the cardiovascular and pulmonary filter with VRT reconstruction, which allows a virtual elimination of different parts of the mummy board to investigate those areas otherwise accessible only by removing parts of the board and thus damaging the work. 相似文献
9.
John Bramble Shawn Steidinger Claire Hamasu Melissa Austin 《Medical reference services quarterly》2018,37(3):306-311
In hospitals and clinics, anyone who “touches” a patient has a license authorizing them to do so—from the phlebotomist to the cardiologist, from the genetic counselor to the social worker, and so on, except for the clinical medical librarian. This column discusses the intent versus the realities of occupational licensure for clinical medical librarians and provides recommendations for next steps. 相似文献
10.
Luke Miratrix Jane Furey Avi Feller Todd Grindal Lindsay C. Page 《Journal of research on educational effectiveness》2018,11(1):133-162
Estimating treatment effects for subgroups defined by posttreatment behavior (i.e., estimating causal effects in a principal stratification framework) can be technically challenging and heavily reliant on strong assumptions. We investigate an alternative path: using bounds to identify ranges of possible effects that are consistent with the data. This simple approach relies on fewer assumptions and yet can result in policy-relevant findings. As we show, even moderately predictive covariates can be used to substantially tighten bounds in a straightforward manner. Via simulation, we demonstrate which types of covariates are maximally beneficial. We conclude with an analysis of a multisite experimental study of Early College High Schools. When examining the program's impact on students completing the ninth grade “on-track” for college, we find little impact for ECHS students who would otherwise attend a high-quality high school, but substantial effects for those who would not. This suggests a potential benefit in expanding these programs in areas primarily served by lower quality schools. 相似文献