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   17463篇
  免费   1630篇
  国内免费   130篇
耳鼻咽喉   173篇
儿科学   474篇
妇产科学   312篇
基础医学   2738篇
口腔科学   493篇
临床医学   1814篇
内科学   3399篇
皮肤病学   436篇
神经病学   1644篇
特种医学   813篇
外科学   2678篇
综合类   259篇
现状与发展   2篇
一般理论   11篇
预防医学   1464篇
眼科学   271篇
药学   1106篇
  2篇
中国医学   50篇
肿瘤学   1084篇
  2023年   90篇
  2021年   371篇
  2020年   257篇
  2019年   365篇
  2018年   356篇
  2017年   297篇
  2016年   347篇
  2015年   430篇
  2014年   603篇
  2013年   790篇
  2012年   1176篇
  2011年   1210篇
  2010年   669篇
  2009年   531篇
  2008年   1042篇
  2007年   986篇
  2006年   952篇
  2005年   837篇
  2004年   834篇
  2003年   705篇
  2002年   732篇
  2001年   350篇
  2000年   334篇
  1999年   284篇
  1998年   158篇
  1997年   139篇
  1996年   125篇
  1995年   127篇
  1994年   129篇
  1993年   125篇
  1992年   223篇
  1991年   234篇
  1990年   223篇
  1989年   191篇
  1988年   206篇
  1987年   181篇
  1986年   172篇
  1985年   168篇
  1984年   143篇
  1983年   126篇
  1982年   136篇
  1981年   115篇
  1980年   102篇
  1979年   117篇
  1978年   107篇
  1975年   96篇
  1974年   89篇
  1973年   101篇
  1972年   89篇
  1971年   91篇
排序方式: 共有10000条查询结果,搜索用时 109 毫秒
1.
2.
3.
4.
5.
6.
7.
Few studies have examined the effects of parental incarceration (PI) on outcomes above and beyond other risk and adverse childhood experiences (ACEs). The objectives of this study were to (1) the associations between PI and mental health problems (attention, externalizing, internalizing, and total behavioral problems) and (2) the mediating role of current socioeconomic status and cumulative ACEs. An observational and cross-sectional design was employed. Analyses included hierarchical multivariable linear regression modeling. The analytic sample included 613 adolescents (11–17?years). On average, youth exposed to PI experienced three times as many ACEs compared with youth unexposed. Youth exposed to PI were more likely to have behavioral problems than their unexposed peers. The main effect for all models was attenuated by current economic hardship as well as exposure to increasing numbers of ACEs. Exposure to PI can be viewed as a marker of accumulative risk for intervention since youth impacted by PI are more likely to experience behavioral difficulties and associated adverse childhood experiences. Due to the associated adversity that impact youth exposed to PI, mental health providers need to be able to identify and screen for symptoms associated with trauma.  相似文献   
8.
The Lapidus bunionectomy is performed to treat hallux valgus. Recurrence of the deformity remains a concern. A transverse intermetatarsal screw spanning the base of the first metatarsal to the base of the second can increase stability. The neurovascular bundle is located within the proximity of this screw. In this study, we assessed the structures at risks with the use of this technique. In 10 specimens, a guide wire was placed, and a 4.0-mm cannulated screw was inserted. The neurovascular bundle was dissected and inspected for direct trauma to the neurovascular bundle, and the proximity of the screw was measured using a digital caliper. Ten cadaveric specimens were used. The dorsalis pedis artery and deep peroneal nerve were free from injury in 9 of 10 specimens. In those 9 specimens, the neurovascular bundle was located dorsal in relation to the screw. The mean distance of the screw to the neurovascular bundle was 7.1 ± 3.3 mm. The mean distance from the screw to the first tarsometatarsal joint (TMTJ) was 14.7 ± 4.3 mm. The mean distance from the screw as it entered the second metatarsal to the second TMTJ was 18.0 ± 7.2 mm. In 1 specimen, the screw was found to be traversing through the neurovascular bundle. The distance from the screw to the first TMTJ was 15.0 mm. The distance of the screw from where it entered the second metatarsal to the second TMTJ was 24.0 mm. Although the intermetatarsal screw avoided the neurovascular cases in most instances, there is some anatomic risk to the neurovascular bundle. Further study is warranted to evaluate clinical results using the intermetatarsal screw for the modified Lapidus procedure.  相似文献   
9.
10.
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