收费全文 | 28916篇 |
免费 | 1673篇 |
国内免费 | 120篇 |
耳鼻咽喉 | 281篇 |
儿科学 | 629篇 |
妇产科学 | 571篇 |
基础医学 | 3684篇 |
口腔科学 | 526篇 |
临床医学 | 2652篇 |
内科学 | 6550篇 |
皮肤病学 | 346篇 |
神经病学 | 2372篇 |
特种医学 | 858篇 |
外国民族医学 | 1篇 |
外科学 | 4611篇 |
综合类 | 236篇 |
一般理论 | 32篇 |
预防医学 | 2471篇 |
眼科学 | 537篇 |
药学 | 2335篇 |
中国医学 | 41篇 |
肿瘤学 | 1976篇 |
2023年 | 154篇 |
2022年 | 198篇 |
2021年 | 634篇 |
2020年 | 381篇 |
2019年 | 519篇 |
2018年 | 646篇 |
2017年 | 483篇 |
2016年 | 533篇 |
2015年 | 567篇 |
2014年 | 829篇 |
2013年 | 1133篇 |
2012年 | 1759篇 |
2011年 | 2000篇 |
2010年 | 1045篇 |
2009年 | 896篇 |
2008年 | 1571篇 |
2007年 | 1770篇 |
2006年 | 1596篇 |
2005年 | 1633篇 |
2004年 | 1618篇 |
2003年 | 1536篇 |
2002年 | 1425篇 |
2001年 | 634篇 |
2000年 | 581篇 |
1999年 | 579篇 |
1998年 | 308篇 |
1997年 | 201篇 |
1996年 | 183篇 |
1995年 | 174篇 |
1994年 | 142篇 |
1993年 | 143篇 |
1992年 | 427篇 |
1991年 | 359篇 |
1990年 | 369篇 |
1989年 | 381篇 |
1988年 | 353篇 |
1987年 | 337篇 |
1986年 | 288篇 |
1985年 | 250篇 |
1984年 | 227篇 |
1983年 | 190篇 |
1982年 | 127篇 |
1981年 | 98篇 |
1980年 | 88篇 |
1979年 | 166篇 |
1978年 | 112篇 |
1977年 | 95篇 |
1976年 | 83篇 |
1975年 | 105篇 |
1971年 | 90篇 |
Background
On April 1, 2016, the Ministerial ordinance was enforced, and musculoskeletal examination of the extremities was made mandatory. From 2008, the University of us started musculoskeletal direct examination. To expand the examination, from 2016, we started to use the marksheet-type questionnaire. This study aimed to report the results of a musculoskeletal examination and investigate the association between musculoskeletal examination and age/gender and reports the reliability of the collected questionnaire data.Methods
Direct musculoskeletal examination was performed in K school by 7 orthopedic surgeons. A marksheet-type screening questionnaire was distributed to all the elementary and junior high school students in Tsukuba and Hitachiomiya cities. The rates of abnormal findings for scoliosis, standing flexion, full squatting with the heels on the floor, general joint laxity, and standing on one leg, torticollis, and flat feet were calculated. We compared the results of the questionnaire and direct examination and calculated sensitivity, specificity, and odds ratio.Results
A total of 1844 students in K school had direct examination, and 22,494 questionnaires were able to correct in Tsukuba and Hitachiomiya cities. The rates of abnormal findings in direct examination/questionnaire in scoliosis, standing flexion, full squat, general joint laxity, standing on one leg, torticollis and flat foot were 18.7% (344/1842)/5.1% (1094/21441), 20.2% (372/1841)/26.6% (5817/22078), 6.2% (114/1832)/6.9% (1516/22101), 7.5% (1648/22252), 4.9% (1100/22077), 2.2% (31/1844)/1.2% (272/21687), and 12.5% (231/1842)/8.7% (1785/20871), respectively. Sensitivities of the questionnaire for scoliosis, stand flexion, full squatting, torticollis, and flat feet were 16.8% (53/316), 67.9% (250/368), 48.2% (55/114), 18.9% (7/37), and 32.2% (65/202), respectively.Conclusion
We reported the result of musculoskeletal examination. Accuracy and reliability of this questionnaire were not satisfactory. To perform high quality musculoskeletal examinations, we will aim to increase the quality of screening methods. 相似文献Methods: A cross-sectional prospective cohort study with 7-day follow-up was conducted. Body composition, cardiorespiratory fitness and biomarkers of cardiometabolic health were measured in thirty-three participants with SCI (> 1 year post injury). Physical activity dimensions were objectively assessed over 7-days.
Results: Activity energy expenditure (r =.43), physical activity level (r =.39), and moderate-to-vigorous physical activity (MVPA) (r =.48) were significantly (P < 0.001) associated with absolute (L/min) peak oxygen uptake (?O2 peak). ?O2 peak was significantly higher in persons performing ≥150 MVPA minutes/week compared to <40 minutes/week (P?=?0.003). Individual physical activity dimensions were not significantly associated with biomarkers of cardiometabolic health. However, body composition characteristics (BMI, waist and hip circumference) showed significant (P < 0.04), moderate (r >.30) associations with parameters of metabolic regulation, lipid profiles and inflammatory biomarkers. Relative ?O2 peak (ml/kg/min) was moderately associated with only insulin sensitivity (r?=?0.37, P?=?0.03).
Conclusions: Physical activity dimensions are associated with cardiorespiratory fitness; however, stronger and more consistent associations suggest that poor cardiometabolic health is associated with higher body fat content. Given these findings, the regulation of energy balance should be an important consideration for researchers and clinicians looking to improve cardiometabolic health in persons with SCI. 相似文献