全文获取类型
收费全文 | 59763篇 |
免费 | 4885篇 |
国内免费 | 126篇 |
专业分类
耳鼻咽喉 | 714篇 |
儿科学 | 2200篇 |
妇产科学 | 1542篇 |
基础医学 | 7558篇 |
口腔科学 | 657篇 |
临床医学 | 7450篇 |
内科学 | 10747篇 |
皮肤病学 | 1167篇 |
神经病学 | 5804篇 |
特种医学 | 1414篇 |
外科学 | 6835篇 |
综合类 | 589篇 |
现状与发展 | 1篇 |
一般理论 | 98篇 |
预防医学 | 8069篇 |
眼科学 | 1006篇 |
药学 | 4229篇 |
中国医学 | 67篇 |
肿瘤学 | 4627篇 |
出版年
2023年 | 571篇 |
2022年 | 459篇 |
2021年 | 2077篇 |
2020年 | 1375篇 |
2019年 | 2189篇 |
2018年 | 2362篇 |
2017年 | 1782篇 |
2016年 | 1879篇 |
2015年 | 1964篇 |
2014年 | 2762篇 |
2013年 | 3566篇 |
2012年 | 5388篇 |
2011年 | 5271篇 |
2010年 | 2862篇 |
2009年 | 2331篇 |
2008年 | 4043篇 |
2007年 | 3876篇 |
2006年 | 3639篇 |
2005年 | 3417篇 |
2004年 | 2988篇 |
2003年 | 2495篇 |
2002年 | 2200篇 |
2001年 | 396篇 |
2000年 | 308篇 |
1999年 | 378篇 |
1998年 | 334篇 |
1997年 | 261篇 |
1996年 | 203篇 |
1995年 | 220篇 |
1994年 | 176篇 |
1993年 | 136篇 |
1992年 | 184篇 |
1991年 | 176篇 |
1990年 | 201篇 |
1989年 | 196篇 |
1988年 | 167篇 |
1987年 | 143篇 |
1986年 | 144篇 |
1985年 | 132篇 |
1984年 | 124篇 |
1983年 | 105篇 |
1982年 | 64篇 |
1981年 | 73篇 |
1980年 | 65篇 |
1979年 | 106篇 |
1978年 | 106篇 |
1977年 | 84篇 |
1976年 | 76篇 |
1974年 | 70篇 |
1973年 | 80篇 |
排序方式: 共有10000条查询结果,搜索用时 22 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.
3.
4.
The use of radiation for primary liver cancers has historically been limited because of the risk of radiation-induced liver disease. Treatment fields have become more conformal because of several technical advances, and this has allowed for dose escalation. Stereotactic body radiation therapy (SBRT), also known as stereotactic ablative radiotherapy, is now able to safely treat liver tumors to ablative doses while sparing functional liver parenchyma by using highly conformal therapy. Several retrospective and small prospective studies have examined the use of SBRT for liver cancers; however, there is a lack of well-powered randomized studies to definitively guide management in these settings. Recent advances in systemic therapy for primary liver cancers have improved outcomes; however, the optimal selection criteria for SBRT as a local therapy remain unclear among other liver-directed options such as radiofrequency ablation, transarterial chemoembolization, and radioembolization. 相似文献
5.
6.
Eileen M. Dryden PhD Meaghan A. Kennedy MD MPH Jennifer Conti MPH Jacqueline H. Boudreau MPH Chitra P. Anwar MA Kathryn Nearing PhD MA Camilla B. Pimentel PhD MPH William W. Hung MD MPH Lauren R. Moo MD 《Health services research》2023,58(Z1):26-35
Objective
Explore the perceived benefits of a Veterans Health Administration (VHA) geriatric specialty telemedicine service (GRECC Connect) among rural, older patients and caregivers to contribute to an assessment of its quality and value.Data Sources
In Spring 2021, we interviewed a geographically diverse sample of rural, older patients and their caregivers who participated in GRECC Connect telemedicine visits.Study Design
A cross-sectional qualitative study focused on patient and caregiver experiences with telemedicine, including perceived benefits and challenges.Data Collection
We conducted 30 semi-structured qualitative interviews with rural, older (≥65) patients enrolled in the VHA and their caregivers via videoconference or phone. Interviews were recorded, transcribed, and analyzed using a rapid qualitative analysis approach.Principal Findings
Participants described geriatric specialty telemedicine visits focused on cognitive assessments, tailored physical therapy, medication management, education on disease progression, support for managing multiple comorbidities, and suggestions to improve physical functioning. Participants reported that, in addition to prescribing medications and ordering tests, clinicians expedited referrals, coordinated care, and listened to and validated both patient and caregiver concerns. Perceived benefits included improved patient health; increased patient and caregiver understanding and confidence around symptom management; and greater feelings of empowerment, hopefulness, and support. Challenges included difficulty accessing some recommended programs and services, uncertainty related to instructions or follow-up, and not receiving as much information or treatment as desired. The content of visits was well aligned with the domains of the Age-Friendly Health Systems and Geriatric 5Ms frameworks (Medication, Mentation, Mobility, what Matters most, and Multi-complexity).Conclusions
Alignment of patient and caregiver experiences with widely-used models of comprehensive geriatric care indicates that high-quality geriatric care can be provided through virtual modalities. Additional work is needed to develop strategies to address challenges and optimize and expand access to geriatric specialty telemedicine. 相似文献7.
8.
9.
10.
Jennifer Tseng MD 《Journal of surgical oncology》2020,122(1):11-14
What is important to think about in surgical education and technical skills training? Technical skills training is grounded in social cognitive theory and the concepts of modeling and self-efficacy. Cognitive and nontechnical learning is critical to supplement the overall proficiency of the surgical learner in performing an operation. Technical learning is cemented by deliberate practice and there is benefit to productive struggle and failure. External cognitive load should be minimized to maximized operative skills advancement. 相似文献