全文获取类型
收费全文 | 5272篇 |
免费 | 257篇 |
国内免费 | 35篇 |
专业分类
耳鼻咽喉 | 11篇 |
儿科学 | 57篇 |
妇产科学 | 72篇 |
基础医学 | 118篇 |
口腔科学 | 2034篇 |
临床医学 | 1035篇 |
内科学 | 187篇 |
皮肤病学 | 33篇 |
神经病学 | 153篇 |
特种医学 | 96篇 |
外科学 | 297篇 |
综合类 | 575篇 |
预防医学 | 409篇 |
眼科学 | 26篇 |
药学 | 288篇 |
7篇 | |
中国医学 | 125篇 |
肿瘤学 | 41篇 |
出版年
2024年 | 17篇 |
2023年 | 168篇 |
2022年 | 176篇 |
2021年 | 231篇 |
2020年 | 284篇 |
2019年 | 244篇 |
2018年 | 199篇 |
2017年 | 223篇 |
2016年 | 172篇 |
2015年 | 196篇 |
2014年 | 407篇 |
2013年 | 444篇 |
2012年 | 354篇 |
2011年 | 358篇 |
2010年 | 281篇 |
2009年 | 253篇 |
2008年 | 225篇 |
2007年 | 219篇 |
2006年 | 156篇 |
2005年 | 152篇 |
2004年 | 127篇 |
2003年 | 73篇 |
2002年 | 53篇 |
2001年 | 51篇 |
2000年 | 41篇 |
1999年 | 32篇 |
1998年 | 26篇 |
1997年 | 22篇 |
1996年 | 16篇 |
1995年 | 19篇 |
1994年 | 14篇 |
1993年 | 30篇 |
1992年 | 22篇 |
1991年 | 26篇 |
1990年 | 25篇 |
1989年 | 26篇 |
1988年 | 34篇 |
1987年 | 23篇 |
1986年 | 13篇 |
1985年 | 26篇 |
1984年 | 17篇 |
1983年 | 14篇 |
1982年 | 13篇 |
1980年 | 15篇 |
1979年 | 8篇 |
1978年 | 8篇 |
1977年 | 7篇 |
1975年 | 5篇 |
1974年 | 7篇 |
1973年 | 5篇 |
排序方式: 共有5564条查询结果,搜索用时 0 毫秒
21.
R. Bondì R. Padua L. Bondì A. Battaglia E. Romanini A. Campi 《Journal of orthopaedics and traumatology》2007,8(1):36-41
Abstract Calcaneal fracture is the most common of the tarsal fractures and represents 1%–2% of all fractures. The fractures may be
divided into extra-articular (not affecting the joint) and intra-articular (involving the talo-calcaneal and calcaneal cuboid
joints) types. The management of heel fractures includes nonoperative and operative treatments, but no clear consensus has
been reached. The choice of operative treatment is still controversial with many factors influencing the final clinical outcome.
Many studies have assessed the outcome of treatment of calcaneal fractures, but there is a general disagreement on their management.
The objective of this study was to collect and evaluate the scientific evidence reported in the literature supporting the
different treatments for calcaneal fractures. 相似文献
22.
Physical evidence in the form of a high quality bite mark was discovered on a piece of yellow cheese found at the scene of
a crime. The cheese had been frozen by police for 10 days after recovery and before submission to the laboratory for testing.
The double swab technique was used to collect DNA samples. A sample of the suspect’s blood was obtained. Using PCR-based DNA
typing at ten STR loci, (Profiler Plus, Perkin Elmer-Applied Biosystems) it was determined that the DNA from the cheese originated
from the suspect. This case illustrates the importance of a) always considering human bite marks as both physical and biological
evidence, and b) attempting DNA recovery in any case in which minute traces of saliva may be present, even in situations involving
bacteria-rich foods.
Received: 6 July 1998 / Received in revised form: 23 October 1998 相似文献
23.
Neuroimaging in traumatic spinal cord injury: an evidence-based review for clinical practice and research 下载免费PDF全文
Lammertse D Dungan D Dreisbach J Falci S Flanders A Marino R Schwartz E;National Institute on Disability Rehabilitation 《The journal of spinal cord medicine》2007,30(3):205-214
OBJECTIVE: To perform an evidence-based review of the literature on neuroimaging techniques utilized in spinal cord injury clinical practice and research. METHODS: A search of the medical literature for articles on specific neuroimaging techniques used in SCI resulted in 2,302 published reports. Review at the abstract and full report level yielded 99 clinical and preclinical articles that were evaluated in detail. Sixty nine were clinical research studies subjected to quality of evidence grading. Twenty-three articles were drawn from the pre-clinical animal model literature and used for supportive evidence. Seven review articles were included to add an element of previous syntheses of current thinking on neuroimaging topics to the committee process (the review articles were not graded for quality of evidence). A list of clinical and research questions that might be answered on a variety of neuroimaging topics was created for use in article review. Recommendations on the use of neuroimaging in spinal cord injury treatment and research were made based on the quality of evidence. RESULTS: Of the 69 original clinical research articles covering a range of neuroimaging questions, only one was judged to provide Class I evidence, 22 provided Class II evidence, 17 Class III evidence, and 29 Class IV evidence. RECOMMENDATIONS: MRI should be used as the imaging modality of choice for evaluation of the spinal cord after injury. CT and plain radiography should be used to assess the bony anatomy of the spine in patients with SCI. MRI may be used to identify the location of spinal cord injury. MRI may be used to demonstrate the degree of spinal cord compression after SCI. MRI findings of parenchymal hemorrhage/ contusion, edema, and spinal cord disruption in acute and subacute SCI may contribute to the understanding of severity of injury and prognosis for neurological improvement. MRI-Diffusion Weighted Imaging may be useful in quantifying the extent of axonal loss after spinal cord injury. Functional MRI may be useful in measuring the anatomic functional/metabolic correlates of sensory-motor activities in persons with SCI. MR Spectroscopy may be used to measure the biochemical characteristics of the brain and spinal cord following SCI. Intraoperative Spinal Sonography may be used to identify spinal and spinal cord anatomy and gross pathology during surgical procedures. Further research in these areas is warranted to improve the strength of evidence supporting the use of neuroimaging modalities. Positron Emission Tomography may be used to assess metabolic activity of CNS tissue (brain and spinal cord) in patients with SCI. 相似文献
24.
随着抗病毒治疗率的提高,HIV感染者带病存活时间得到延长,随之发生更多的医疗需求,麻醉科实习学生常面临着对正在接受抗病毒治疗的HIV感染者如何选择最佳麻醉方案的问题。循证医学是基于当年可获得的研究证据进行临床决策的一门学科,采用循证医学的实践模式开展临床教学是培养麻醉科医生的循证实践思维的重要手段。本文就针对HIV感染者在麻醉过程中需要解决的问题开展基于循证医学模式的教学,对其核心内容进行总结以供同行探讨。 相似文献
25.
胰腺囊性肿瘤(PCN)是病理特征差异较大的一类疾病,分为良性、恶性及交界恶性,国内外各项指南就如何规范管理提出了相应的专家共识并不断更新完善。本文对2018版《欧洲胰腺囊性肿瘤循证指南》要点进行了解读,该指南是第一部以循证依据为基础制定的胰腺囊性肿瘤诊治、随访的策略,本文将对其核心内容进行总结及分析,旨在提供借鉴,改善我国PCN的诊断和管理。 相似文献
26.
背景 运动为防治绝经后骨质疏松症经济有效的干预措施之一,但目前其相关证据内容广泛且分散,临床尚无规范、全面的运动指导方案。目的 检索、评价并总结绝经后骨质疏松症患者运动干预的最佳证据。方法 系统检索BMJ Best Practice、Up To Date临床顾问、Dyna Med,英国国家临床医学研究所指南网、国际指南网、苏格兰学院间指南网、美国指南网,加拿大安大略注册护士协会、国际骨质疏松症基金会、英国皇家骨质疏松协会、美国骨质疏松症基金会、澳大利亚皇家全科医师学院、美国妇产科医师学会、加拿大妇产科医师协会、医脉通、澳大利亚乔安娜循证研究所网站,Cochrane Library、CINAHL、Web of Science、PubMed、Embase、中国知网、中国生物医学文献服务系统中关于绝经后骨质疏松症运动干预的临床实践指南、临床决策、证据总结、专家共识、系统评价。检索时限为建库至2022年1月。采用临床指南研究与评价系统(AGREEⅡ)对指南进行质量评价,采用证据总结评价工作表(CASE)对临床决策进行质量评价,采用澳大利亚JBI循证卫生保健中心专家共识的真实性评价工具(2016... 相似文献
27.
《Radiography》2022,28(3):804-810
IntroductionRadiographers are responsible for ensuring safe and effective use of ionising radiation. Through evidence-based practice (EBP), valuable optimisation strategies can be implemented to fulfil these responsibilities. This study aimed to explore radiographers' attitudes, perceptions, and experience of using evidence-based optimisation strategies.MethodsA Grounded Theory approach using in-depth interviews. UK-based radiographers were recruited. Discussions focused on (1) the role of evidence-based optimisation strategies in daily practice, (2) assistance in implementing evidence-based optimisation strategies, and (3) the role of EBP and optimisation strategies in the future. Interviews were transcribed verbatim and analysed using open and axial coding.ResultsParticipants (n = 13) stated that EBP is not frequently used to implement optimisation strategies. Participants relied on the knowledge taught in education settings and their professional skills to optimise in daily practice, alongside departmental protocols. Barriers identified as affecting the implementation of optimisation strategies related to reluctance to change, a lack of support from superiors, and a lack of resources to engage with EBP. Some participants expected the use of optimisation strategies to become unnecessary due to technology advancements.ConclusionThe results indicate that effective operationalisation of EBP is not part of daily practice among radiographers to implement valuable optimisation strategies in daily practice.Implications for practiceThe potential barriers to implementing evidence-based optimisation strategies highlighted in this study suggest that improving access to resources and empowerment of individual radiographers is required to enable radiographers to implement optimisation strategies. 相似文献
28.
目的 探讨焦虑抑郁状态对非外科手术治疗的智齿冠周炎复发的影响。方法 选择就诊于中日友好医院口腔医学中心的首发非外科治疗的智齿冠周炎患者,通过发放电子问卷收集如下信息:人口学信息、焦虑量表(GAD-7)和抑郁量表(PHQ-9)。半年后对随访患者的复发情况进行统计,采用多因素logistic回归分析智齿冠周炎复发与患者发病时情绪状态的关系。结果 共收集568份有效问卷,其中7.0%患者存在焦虑状态(GAD-7≥10),13.7%存在抑郁状态(PHQ-9≥10),半年后随访智齿冠周炎的复发率为11.4%。分析智齿冠周炎6个月后复发情况发现,男性的风险低于女性(OR=0.416,P<0.05),焦虑增加了智齿冠周炎的复发风险(OR=1.124,P<0.05)。结论 口腔医师应关注患者焦虑抑郁情绪状态,有助于智齿冠周炎的预防和治疗。 相似文献
29.
30.
Bjorg Hafslund Judith Clare Birgitte Graverholt Monica Wammen Nortvedt 《Radiography》2008,14(4):343-348
Evidence-based practice (EBP) offers the integration of the best research evidence with clinical knowledge and expertise and patient values. EBP is a well known term in health care. This paper discusses the implementation of EBP into radiography and introduces the term evidence-based radiography. Evidence-based radiography is radiography informed and based on the combination of clinical expertise and the best available research-based evidence, patient preferences and resources available.In Norway, EBP in radiography is being debated and radiographers are discussing the challenges of implementing EBP in both academic and clinical practice. This discussion paper explains why EBP needs to be a basis for a radiography curriculum and a part of radiographers' practice. We argue that Norwegian radiographers must increase participation in research and developing practice within their specific radiographic domain. 相似文献