全文获取类型
收费全文 | 2098篇 |
免费 | 305篇 |
国内免费 | 43篇 |
专业分类
耳鼻咽喉 | 9篇 |
儿科学 | 64篇 |
妇产科学 | 91篇 |
基础医学 | 162篇 |
口腔科学 | 75篇 |
临床医学 | 303篇 |
内科学 | 316篇 |
皮肤病学 | 69篇 |
神经病学 | 141篇 |
特种医学 | 62篇 |
外科学 | 276篇 |
综合类 | 234篇 |
现状与发展 | 1篇 |
一般理论 | 3篇 |
预防医学 | 233篇 |
眼科学 | 29篇 |
药学 | 111篇 |
中国医学 | 160篇 |
肿瘤学 | 107篇 |
出版年
2024年 | 14篇 |
2023年 | 82篇 |
2022年 | 188篇 |
2021年 | 211篇 |
2020年 | 239篇 |
2019年 | 157篇 |
2018年 | 136篇 |
2017年 | 91篇 |
2016年 | 119篇 |
2015年 | 61篇 |
2014年 | 124篇 |
2013年 | 177篇 |
2012年 | 90篇 |
2011年 | 81篇 |
2010年 | 65篇 |
2009年 | 68篇 |
2008年 | 60篇 |
2007年 | 71篇 |
2006年 | 59篇 |
2005年 | 46篇 |
2004年 | 34篇 |
2003年 | 37篇 |
2002年 | 29篇 |
2001年 | 27篇 |
2000年 | 26篇 |
1999年 | 21篇 |
1998年 | 14篇 |
1997年 | 8篇 |
1996年 | 18篇 |
1995年 | 19篇 |
1994年 | 6篇 |
1993年 | 14篇 |
1992年 | 11篇 |
1991年 | 13篇 |
1990年 | 12篇 |
1989年 | 2篇 |
1988年 | 8篇 |
1987年 | 1篇 |
1986年 | 2篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1981年 | 2篇 |
排序方式: 共有2446条查询结果,搜索用时 15 毫秒
1.
S. M. White C. L. Shelton A. W. Gelb C. Lawson F. McGain J. Muret J. D. Sherman representing the World Federation of Societies of Anaesthesiologists Global Working Group on Environmental Sustainability in Anaesthesia 《Anaesthesia》2022,77(2):201-212
The Earth’s mean surface temperature is already approximately 1.1°C higher than pre-industrial levels. Exceeding a mean 1.5°C rise by 2050 will make global adaptation to the consequences of climate change less possible. To protect public health, anaesthesia providers need to reduce the contribution their practice makes to global warming. We convened a Working Group of 45 anaesthesia providers with a recognised interest in sustainability, and used a three-stage modified Delphi consensus process to agree on principles of environmentally sustainable anaesthesia that are achievable worldwide. The Working Group agreed on the following three important underlying statements: patient safety should not be compromised by sustainable anaesthetic practices; high-, middle- and low-income countries should support each other appropriately in delivering sustainable healthcare (including anaesthesia); and healthcare systems should be mandated to reduce their contribution to global warming. We set out seven fundamental principles to guide anaesthesia providers in the move to environmentally sustainable practice, including: choice of medications and equipment; minimising waste and overuse of resources; and addressing environmental sustainability in anaesthetists’ education, research, quality improvement and local healthcare leadership activities. These changes are achievable with minimal material resource and financial investment, and should undergo re-evaluation and updates as better evidence is published. This paper discusses each principle individually, and directs readers towards further important references. 相似文献
2.
中国医师协会妇产科医师分会妇科肿瘤学组 《中国实用妇科与产科杂志》2022,38(8):814-819
卵巢囊肿(ovarian cyst)是妇科常见疾病,可发生于任何年龄段,以育龄期最为多见。卵巢囊肿多为良性,除个别因扭转、破裂等表现为急腹症外,一般无特异性症状。部分功能性卵巢囊肿可伴有月经紊乱、腹部不适等症状,多数随着囊肿的消退而逐渐消失。 相似文献
3.
In clinical and epidemiological studies, there is a growing interest in studying the heterogeneity among patients based on longitudinal characteristics to identify subtypes of the study population. Compared to clustering a single longitudinal marker, simultaneously clustering multiple longitudinal markers allow additional information to be incorporated into the clustering process, which reveals co-existing longitudinal patterns and generates deeper biological insight. In the current study, we propose a Bayesian consensus clustering (BCC) model for multivariate longitudinal data. Instead of arriving at a single overall clustering, the proposed model allows each marker to follow marker-specific local clustering and these local clusterings are aggregated to find a global (consensus) clustering. To estimate the posterior distribution of model parameters, a Gibbs sampling algorithm is proposed. We apply our proposed model to the primary biliary cirrhosis study to identify patient subtypes that may be associated with their prognosis. We also perform simulation studies to compare the clustering performance between the proposed model and existing models under several scenarios. The results demonstrate that the proposed BCC model serves as a useful tool for clustering multivariate longitudinal data. 相似文献
4.
《Radiography》2022,28(2):353-359
Patient contact shielding has been in use for many years in radiology departments in order to reduce the effects and risks of ionising radiation on certain organs. New technologies in projection imaging and CT scanning such as digital receptors and automatic exposure control (AEC) systems have reduced doses and improved image consistency. These changes and a greater understanding of both the benefits and the risks from the use of shielding have led to a review of shielding use in radiology. A number of professional bodies have already issued guidance in this regard. This paper represents the current consensus view of the main bodies involved in radiation safety and imaging in Europe: European Federation of Organisations for Medical Physics, European Federation of Radiographer Societies, European Society of Radiology, European Society of Paediatric Radiology, EuroSafe Imaging, European Radiation Dosimetry Group (EURADOS), and European Academy of DentoMaxilloFacial Radiology (EADMFR). It is based on the expert recommendations of the Gonad and Patient Shielding (GAPS) Group formed with the purpose of developing consensus in this area. The recommendations are intended to be clear and easy to use. They are intended as guidance, and they are developed using a multidisciplinary team approach. It is recognised that regulations, custom and practice vary widely on the use of patient shielding in Europe and it is hoped that these recommendations will inform a change management program that will benefit patients and staff. 相似文献
5.
Michael T Milano Veronica L S Chiang Scott G Soltys Tony J C Wang Simon S Lo Alexandria Brackett Seema Nagpal Samuel Chao Amit K Garg Siavash Jabbari Lia M Halasz Melanie Hayden Gephart Jonathan P S Knisely Arjun Sahgal Eric L Chang 《Neuro-oncology》2020,22(12):1728
BackgroundThe American Radium Society (ARS) Appropriate Use Criteria brain malignancies panel systematically reviewed (PRISMA [Preferred Reporting Items for Systematic Reviews and Meta-Analyses]) published literature on neurocognitive outcomes after stereotactic radiosurgery (SRS) for patients with multiple brain metastases (BM) to generate consensus guidelines.MethodsThe panel developed 4 key questions (KQs) to guide systematic review. From 11 614 original articles, 12 were selected. The panel developed model cases addressing KQs and potentially controversial scenarios not addressed in the systematic review (which might inform future ARS projects). Based upon quality of evidence, the panel confidentially voted on treatment options using a 9-point scale of appropriateness.ResultsThe panel agreed that SRS alone is usually appropriate for those with good performance status and 2–10 asymptomatic BM, and usually not appropriate for >20 BM. For 11–15 and 16–20 BM there was (between 2 case variants) agreement that SRS alone may be appropriate or disagreement on the appropriateness of SRS alone. There was no scenario (among 6 case variants) in which conventional whole-brain radiotherapy (WBRT) was considered usually appropriate by most panelists. There were several areas of disagreement, including: hippocampal sparing WBRT for 2–4 asymptomatic BM; WBRT for resected BM amenable to SRS; fractionated versus single-fraction SRS for resected BM, larger targets, and/or brainstem metastases; optimal treatment (WBRT, hippocampal sparing WBRT, SRS alone to all or select lesions) for patients with progressive extracranial disease, poor performance status, and no systemic options.ConclusionsFor patients with 2–10 BM, SRS alone is an appropriate treatment option for well-selected patients with good performance status. Future study is needed for those scenarios in which there was disagreement among panelists. 相似文献
6.
心脑宁胶囊治疗动脉粥样硬化性心血管疾病临床应用专家共识 总被引:1,自引:0,他引:1
陆峰 胡元会 陈志刚 卢健棋 戴小华 符德玉 苗华为 陈明 周卫东 韩祖成 杨东东 王振涛 杜廷海 杨锡燕 陈颖 张艳 白雪 许滔 徐浩 王永霞 王佑华 王庆高 褚瑜光 何志义 田颖 陆芳 伊博文 《中草药》2020,51(11):2863-2870
本共识建立了成人动脉粥样硬化性心血管疾病(atherosclerotic cardiovascular disease,ASCVD)高危人群规范应用心脑宁胶囊以提升疗效的关键流程,概述了心脑宁胶囊的中医配伍理论、药学和药理研究特性,界定了心脑宁胶囊的精确适用人群、干预时机、病证疗效特点及优选应用方案,归纳了心脑宁胶囊的不良反应、使用禁忌、注意事项及非临床安全性等相关证据。本共识适合ASCVD相关专业领域的执业医师、执业中医医师和执业中西医结合医师使用。 相似文献
7.
中医药是中华民族的瑰宝,随着人工智能(Artificial Intelligence,AI)的迅猛发展,中医药与AI的结合将可以为中医药的传承和现代化提供助力。本研究将从搭建AI中医专家系统入手,阐述AI对提高中医诊断的作用,物联网搭建AI中医药服务,存在的问题和对策,以及中医药人工智能化的前景,以图为中医药的发展提供新的思路和方法。 相似文献
8.
9.
10.