全文获取类型
收费全文 | 2382615篇 |
免费 | 199923篇 |
国内免费 | 4617篇 |
专业分类
耳鼻咽喉 | 34797篇 |
儿科学 | 72955篇 |
妇产科学 | 63503篇 |
基础医学 | 335747篇 |
口腔科学 | 67870篇 |
临床医学 | 216393篇 |
内科学 | 469666篇 |
皮肤病学 | 48760篇 |
神经病学 | 201083篇 |
特种医学 | 97177篇 |
外国民族医学 | 886篇 |
外科学 | 362910篇 |
综合类 | 56535篇 |
现状与发展 | 1篇 |
一般理论 | 992篇 |
预防医学 | 190129篇 |
眼科学 | 56133篇 |
药学 | 179319篇 |
4篇 | |
中国医学 | 4579篇 |
肿瘤学 | 127716篇 |
出版年
2018年 | 25047篇 |
2017年 | 19387篇 |
2016年 | 21403篇 |
2015年 | 24428篇 |
2014年 | 34866篇 |
2013年 | 52362篇 |
2012年 | 70963篇 |
2011年 | 74555篇 |
2010年 | 43864篇 |
2009年 | 42049篇 |
2008年 | 70396篇 |
2007年 | 74642篇 |
2006年 | 75389篇 |
2005年 | 73348篇 |
2004年 | 70318篇 |
2003年 | 67932篇 |
2002年 | 67061篇 |
2001年 | 112722篇 |
2000年 | 116592篇 |
1999年 | 98040篇 |
1998年 | 26328篇 |
1997年 | 23919篇 |
1996年 | 23865篇 |
1995年 | 24573篇 |
1994年 | 23129篇 |
1993年 | 21494篇 |
1992年 | 79432篇 |
1991年 | 76507篇 |
1990年 | 73692篇 |
1989年 | 70944篇 |
1988年 | 65926篇 |
1987年 | 64866篇 |
1986年 | 61391篇 |
1985年 | 58472篇 |
1984年 | 44224篇 |
1983年 | 37606篇 |
1982年 | 22848篇 |
1981年 | 20270篇 |
1979年 | 41293篇 |
1978年 | 28955篇 |
1977年 | 24288篇 |
1976年 | 22778篇 |
1975年 | 23939篇 |
1974年 | 29615篇 |
1973年 | 28040篇 |
1972年 | 26232篇 |
1971年 | 24163篇 |
1970年 | 22750篇 |
1969年 | 21074篇 |
1968年 | 19120篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Espersen Caroline Modin Daniel Hoffmann Søren Hagemann Christoffer A. Hagemann Rikke A. Olsen Flemming J. Fritz-Hansen Thomas Platz Elke Møgelvang Rasmus Biering-Sørensen Tor 《The international journal of cardiovascular imaging》2022,38(1):131-140
The International Journal of Cardiovascular Imaging - Global longitudinal strain (GLS) has proven to be a powerful prognostic marker in various patient populations, but the prognostic value of... 相似文献
2.
3.
Kevin Kyung Ho Choi Santosh Sanagapalli 《World journal of gastrointestinal oncology》2022,14(3):568-586
Barrett's esophagus (BE) is the precursor to esophageal adenocarcinoma (EAC). Progression to cancer typically occurs in a stepwise fashion through worsening dysplasia and ultimately, invasive neoplasia. Established EAC with deep involvement of the esophageal wall and/or metastatic disease is invariably associated with poor long-term survival rates. This guides the rationale of surveillance of Barrett’s in an attempt to treat lesions at an earlier, and potentially curative stage. The last two decades have seen a paradigm shift in management of Barrett’s with rapid expansion in the role of endoscopic eradication therapy (EET) for management of dysplastic and early neoplastic BE, and there have been substantial changes to international consensus guidelines for management of early BE based on evolving evidence. This review aims to assist the physician in the therapeutic decision-making process with patients by comprehensive review and summary of literature surrounding natural history of Barrett’s by histological stage, and the effectiveness of interventions in attenuating the risk posed by its natural history. Key findings were as follows. Non-dysplastic Barrett’s is associated with extremely low risk of progression, and interventions cannot be justified. The annual risk of cancer progression in low grade dysplasia is between 1%-3%; EET can be offered though evidence for its benefit remains confined to highly select settings. High-grade dysplasia progresses to cancer in 5%-10% per year; EET is similarly effective to and less morbid than surgery and should be routinely performed for this indication. Risk of nodal metastases in intramucosal cancer is 2%-4%, which is comparable to operative mortality rate, so EET is usually preferred. Submucosal cancer is associated with nodal metastases in 14%-41% hence surgery remains standard of care, except for select situations. 相似文献
4.
5.
6.
Mahmut Gümüş MD Chieh-I Chen MPH Cristina Ivanescu PhD Saadettin Kilickap MD Igor Bondarenko MD Mustafa Özgüroğlu MD Miranda Gogishvili MD Haci M. Turk MD Irfan Cicin MD James Harnett PharmD Vera Mastey MS Ulrike Naumann MS Matthew Reaney MS Gerasimos Konidaris MS Medha Sasane PhD Keri J. S. Brady PhD Siyu Li PhD Giuseppe Gullo MD Petra Rietschel MD Ahmet Sezer MD 《Cancer》2023,129(1):118-129
7.
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
8.
9.
Die Anaesthesiologie - 相似文献
10.