全文获取类型
收费全文 | 3235篇 |
免费 | 304篇 |
国内免费 | 40篇 |
专业分类
耳鼻咽喉 | 52篇 |
儿科学 | 88篇 |
妇产科学 | 57篇 |
基础医学 | 467篇 |
口腔科学 | 46篇 |
临床医学 | 294篇 |
内科学 | 706篇 |
皮肤病学 | 39篇 |
神经病学 | 256篇 |
特种医学 | 74篇 |
外科学 | 626篇 |
综合类 | 84篇 |
预防医学 | 172篇 |
眼科学 | 148篇 |
药学 | 171篇 |
中国医学 | 33篇 |
肿瘤学 | 266篇 |
出版年
2023年 | 24篇 |
2022年 | 23篇 |
2021年 | 65篇 |
2020年 | 54篇 |
2019年 | 96篇 |
2018年 | 95篇 |
2017年 | 67篇 |
2016年 | 91篇 |
2015年 | 91篇 |
2014年 | 146篇 |
2013年 | 161篇 |
2012年 | 239篇 |
2011年 | 275篇 |
2010年 | 131篇 |
2009年 | 100篇 |
2008年 | 198篇 |
2007年 | 187篇 |
2006年 | 204篇 |
2005年 | 209篇 |
2004年 | 182篇 |
2003年 | 157篇 |
2002年 | 141篇 |
2001年 | 105篇 |
2000年 | 97篇 |
1999年 | 71篇 |
1998年 | 28篇 |
1997年 | 26篇 |
1996年 | 14篇 |
1995年 | 15篇 |
1994年 | 8篇 |
1993年 | 7篇 |
1992年 | 30篇 |
1991年 | 29篇 |
1990年 | 27篇 |
1989年 | 30篇 |
1988年 | 34篇 |
1987年 | 24篇 |
1986年 | 29篇 |
1985年 | 14篇 |
1984年 | 12篇 |
1983年 | 11篇 |
1982年 | 6篇 |
1981年 | 6篇 |
1980年 | 3篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1976年 | 2篇 |
1975年 | 2篇 |
1968年 | 2篇 |
1966年 | 2篇 |
排序方式: 共有3579条查询结果,搜索用时 15 毫秒
61.
62.
Seungmi Ryu Nicola Martino Sheldon J. J. Kwok Liane Bernstein Seok-Hyun Yun 《Biomedical optics express》2021,12(3):1437
Brillouin light scattering offers a unique label-free approach to measure biomechanical properties non-invasively. While this technique is used in biomechanical analysis of cells and tissues, its potential for visualizing structural features of tissues based on the biomechanical contrast has not been much exploited. Here, we present high-resolution Brillouin microscopy images of four basic tissue types: muscular, connective, epithelial, and nervous tissues. The Brillouin contrast distinguishes between muscle fiber cells and endomysium in skeletal muscle and reveals chondrocytes along with spatially varying stiffness of the extracellular matrix in articular cartilage. The hydration-sensitive contrast can visualize the stratum corneum, epidermis, and dermis in the skin epithelium. In brain tissues, the Brillouin images show the mechanical heterogeneity across the cortex and deeper regions. This work demonstrates the versatility of using the Brillouin shift as histological contrast for examining intact tissue substructures via longitudinal modulus without the need for laborious tissue processing steps. 相似文献
63.
Yi Su Jean W. Woo Timothy C.Y. Kwok 《Journal of the American Medical Directors Association》2019,20(1):83-89
Objectives
To examine the potential added value of a simple 5-item questionnaire for sarcopenia screening (SARC-F) to the Fracture Risk Assessment Tool (FRAX) for hip fracture risk prediction, in order to identify at-risk older adults for screening with dual-energy x-ray absorptiometry (DXA).Design
A prospective cohort study.Setting and participants
Two thousand Chinese men and 2000 Chinese women aged 65 years or older were recruited from local communities and were prospectively followed up for about 10 years.Measures
Areal bone mineral density (BMD) of hip and lumbar spine were measured by DXA at baseline. Ten-year FRAX probability of hip fracture was calculated using the baseline risk factors. Information from the baseline questionnaire was extracted to calculate a modified SARC-F score. The independent predictive values of SARC-F and FRAX questionnaire were evaluated using multivariate survival analysis. The added predictive values of SARC-F to FRAX for pre-DXA screening were examined.Results
During the follow-up, 63 (3.2%) men and 69 (3.5%) women had at least 1 incident hip fracture. SARC-F had an independent value of FRAX for hip fracture risk prediction, with an adjusted hazard ratio [95% confidence interval (CI)] of 1.24 (1.02, 1.52) and 1.15 (0.99, 1.13) in men and women, respectively. Compared with using FRAX, using SARC-F in conjunction with FRAX made the sensitivity for prediction rise from 58.7% to 76.2% in men and from 69.6% to 78.3% in women, with a nondecreased area under receiver operating characteristic curve of 0.67. Prescreening using FRAX in conjunction with SARC-F could save more than half of the DXA assessment than with no prescreening.Conclusions/Implications
SARC-F is associated with a modest increase in hip fracture risk, especially in men. Conjoint evaluation for sarcopenia in addition to FRAX screening may help identify older adults at higher risk of hip fracture for more intensive screening and/or preventive interventions. 相似文献64.
Timothy S. H. Kwok David S. Sands 《Journal of immigrant and minority health / Center for Minority Public Health》2018,20(4):763-765
The number of Internally Displaced People is growing globally with a significant number travelling to countries such as Canada. These individuals have unique health care needs that are significantly impacted by several social determinants of health, which provides a challenge to the physician as they must address the biological, psychological and social factors in order to effectively improve the health of this population. The physician must work at the individual, national, and international levels and collaborate with other health care workers in order to effectively address these complex health care issues. Some recent strategies that show promise in targeting these complex care issues include knowledge sharing among medical professionals, specialized treatment approaches including treatment through telemedicine as well as political advocacy. The application of strategies such as these, along with increased awareness and commitment from physicians, will work to improve health care and prevent negative health outcomes in this growing population. 相似文献
65.
Martin C.W. Chan Ting F. Leung Angela K. Kwok Nelson Lee Paul K.S. Chan 《Emerging infectious diseases》2014,20(4):658-661
Norovirus GII.4 Sydney 2012 has spread globally since late 2012. We report hospitalization of patients infected with this strain skewed toward infants and young children among 174 cases during August 2012–July 2013 in Hong Kong, China. This group had higher fecal viral load (≈10-fold) than did older children and adults. 相似文献
66.
67.
68.
69.
70.