首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1355542篇
  免费   95074篇
  国内免费   1582篇
耳鼻咽喉   17048篇
儿科学   44229篇
妇产科学   36346篇
基础医学   200123篇
口腔科学   35289篇
临床医学   123474篇
内科学   266602篇
皮肤病学   27707篇
神经病学   110828篇
特种医学   50963篇
外国民族医学   265篇
外科学   194631篇
综合类   26535篇
现状与发展   3篇
一般理论   568篇
预防医学   112801篇
眼科学   28997篇
药学   97216篇
  6篇
中国医学   2030篇
肿瘤学   76537篇
  2018年   23712篇
  2017年   18726篇
  2016年   21501篇
  2015年   13449篇
  2014年   18333篇
  2013年   27788篇
  2012年   40507篇
  2011年   49248篇
  2010年   30351篇
  2009年   27758篇
  2008年   47404篇
  2007年   52233篇
  2006年   40254篇
  2005年   41036篇
  2004年   40007篇
  2003年   39721篇
  2002年   37403篇
  2001年   56391篇
  2000年   57609篇
  1999年   48379篇
  1998年   13610篇
  1997年   12492篇
  1996年   12802篇
  1995年   12080篇
  1994年   11293篇
  1993年   10541篇
  1992年   38349篇
  1991年   37829篇
  1990年   36610篇
  1989年   35427篇
  1988年   32812篇
  1987年   32173篇
  1986年   30645篇
  1985年   28903篇
  1984年   22031篇
  1983年   19273篇
  1982年   11456篇
  1981年   10339篇
  1979年   21048篇
  1978年   15461篇
  1977年   12816篇
  1976年   11915篇
  1975年   12812篇
  1974年   15613篇
  1973年   15376篇
  1972年   14515篇
  1971年   13554篇
  1970年   12821篇
  1969年   12100篇
  1968年   11257篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
ABSTRACT

Purpose

New instrument-based techniques for anterior chamber (AC) cell counting can offer automation and objectivity above clinician assessment. This review aims to identify such instruments and its correlation with clinician estimates.  相似文献   
72.
Objective: A multidisciplinary vocational rehabilitation programme, the Vocational Enablement Protocol (VEP) was developed to address the specific needs of employees with hearing difficulties. In the current study we evaluated the process of implementing the VEP in audiologic care among employees with hearing impairment. Design: In conjunction with a randomized controlled trial, we collected and analysed data on seven process parameters: recruitment, reach, fidelity, dose delivered, dose received and implemented, satisfaction, and perceived benefit. Study sample: Sixty-six employees with hearing impairment participated in the VEP. The multidisciplinary team providing the VEP comprised six professionals. Results: The professionals performed the VEP according to the protocol. Of the recommendations delivered by the professionals, 31% were perceived as implemented by the employees. Compliance rate was highest for hearing-aid uptake (51%). Both employees and professionals were highly satisfied with the VEP. Participants rated good perceived benefit from it. Conclusions: Our results indicate that the VEP could be a useful treatment for employees with hearing difficulties from a process evaluation perspective. Implementation research in the audiological setting should be encouraged in order to further provide insight into parameters facilitating or hindering successful implementation of an intervention and to improve its quality and efficacy.  相似文献   
73.
74.
75.
76.
77.
78.
79.
80.
Objective: To examine (i) the associations between physical activity dimensions, cardiorespiratory fitness and body composition and, (ii) the associations between physical activity dimensions, cardiorespiratory fitness, body composition and biomarkers of cardiometabolic health in persons with spinal cord injury (SCI).

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   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号