全文获取类型
收费全文 | 1399663篇 |
免费 | 115466篇 |
国内免费 | 3315篇 |
专业分类
耳鼻咽喉 | 18342篇 |
儿科学 | 46418篇 |
妇产科学 | 41033篇 |
基础医学 | 199021篇 |
口腔科学 | 37637篇 |
临床医学 | 125220篇 |
内科学 | 281735篇 |
皮肤病学 | 33322篇 |
神经病学 | 115952篇 |
特种医学 | 53763篇 |
外国民族医学 | 464篇 |
外科学 | 209943篇 |
综合类 | 32694篇 |
现状与发展 | 3篇 |
一般理论 | 487篇 |
预防医学 | 109133篇 |
眼科学 | 31383篇 |
药学 | 98161篇 |
1篇 | |
中国医学 | 3266篇 |
肿瘤学 | 80466篇 |
出版年
2019年 | 11656篇 |
2018年 | 16563篇 |
2017年 | 12663篇 |
2016年 | 14253篇 |
2015年 | 15999篇 |
2014年 | 22550篇 |
2013年 | 33380篇 |
2012年 | 45367篇 |
2011年 | 47904篇 |
2010年 | 28145篇 |
2009年 | 27040篇 |
2008年 | 44301篇 |
2007年 | 46805篇 |
2006年 | 47376篇 |
2005年 | 45844篇 |
2004年 | 43733篇 |
2003年 | 41586篇 |
2002年 | 40078篇 |
2001年 | 72874篇 |
2000年 | 74351篇 |
1999年 | 61160篇 |
1998年 | 16020篇 |
1997年 | 14377篇 |
1996年 | 14535篇 |
1995年 | 14686篇 |
1994年 | 13337篇 |
1993年 | 12513篇 |
1992年 | 45776篇 |
1991年 | 43464篇 |
1990年 | 41462篇 |
1989年 | 39529篇 |
1988年 | 36135篇 |
1987年 | 35330篇 |
1986年 | 32833篇 |
1985年 | 31255篇 |
1984年 | 23783篇 |
1983年 | 19967篇 |
1982年 | 12162篇 |
1981年 | 10725篇 |
1979年 | 20658篇 |
1978年 | 14546篇 |
1977年 | 12035篇 |
1976年 | 11313篇 |
1975年 | 11583篇 |
1974年 | 13965篇 |
1973年 | 13512篇 |
1972年 | 12622篇 |
1971年 | 11459篇 |
1970年 | 10894篇 |
1969年 | 10062篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
91.
Roby Naym U. Packham Tara L. MacDermid Joy C. Carlesso Lisa C. 《Clinical rheumatology》2022,41(10):3159-3168
Clinical Rheumatology - Central sensitization (CS) is a known contributor to chronic pain in people with knee osteoarthritis (KOA) and is commonly measured by psychophysical testing or... 相似文献
92.
M. D. Wiles A. El-Nayal G. Elton M. Malaj J. Winterbottom C. Gillies I. K. Moppett K. Bauchmuller 《Anaesthesia》2022,77(2):143-152
Pulse oximetry is used widely to titrate oxygen therapy and for triage in patients who are critically ill. However, there are concerns regarding the accuracy of pulse oximetry in patients with COVID-19 pneumonitis and in patients who have a greater degree of skin pigmentation. We aimed to determine the impact of patient ethnicity on the accuracy of peripheral pulse oximetry in patients who were critically ill with COVID-19 pneumonitis by conducting a retrospective observational study comparing paired measurements of arterial oxygen saturation measured by co-oximetry on arterial blood gas analysis (SaO2) and the corresponding peripheral oxygenation saturation measured by pulse oximetry (SpO2). Bias was calculated as the mean difference between SaO2 and SpO2 measurements and limits of agreement were calculated as bias ±1.96 SD. Data from 194 patients (135 White ethnic origin, 34 Asian ethnic origin, 19 Black ethnic origin and 6 other ethnic origin) were analysed consisting of 6216 paired SaO2 and SpO2 measurements. Bias (limits of agreement) between SaO2 and SpO2 measurements was 0.05% (−2.21–2.30). Patient ethnicity did not alter this to a clinically significant degree: 0.28% (1.79–2.35), −0.33% (−2.47–2.35) and −0.75% (−3.47–1.97) for patients of White, Asian and Black ethnic origin, respectively. In patients with COVID-19 pneumonitis, SpO2 measurements showed a level of agreement with SaO2 values that was in line with previous work, and this was not affected by patient ethnicity. 相似文献
93.
Improving hyperpolarized 129Xe ADC mapping in pediatric and adult lungs with uncertainty propagation
94.
95.
96.
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
97.
98.
99.
100.
Macêdo Jéssica V. L. Frias Isaac A. M. Oliveira Maria D. L. Zanghelini Fernando Andrade César A. S. 《European journal of clinical microbiology & infectious diseases》2022,41(9):1191-1201
European Journal of Clinical Microbiology & Infectious Diseases - Rapid immunochromatographic tests are frequently used to diagnose dengue due to their easy use, low cost, and fast response. A... 相似文献