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   1850篇
  免费   153篇
  国内免费   9篇
耳鼻咽喉   99篇
儿科学   70篇
妇产科学   21篇
基础医学   196篇
口腔科学   39篇
临床医学   232篇
内科学   318篇
皮肤病学   13篇
神经病学   121篇
特种医学   284篇
外科学   188篇
综合类   47篇
预防医学   100篇
眼科学   59篇
药学   77篇
中国医学   5篇
肿瘤学   143篇
  2024年   3篇
  2023年   11篇
  2022年   8篇
  2021年   24篇
  2020年   13篇
  2019年   18篇
  2018年   49篇
  2017年   25篇
  2016年   36篇
  2015年   34篇
  2014年   56篇
  2013年   56篇
  2012年   82篇
  2011年   67篇
  2010年   55篇
  2009年   78篇
  2008年   76篇
  2007年   61篇
  2006年   53篇
  2005年   50篇
  2004年   70篇
  2003年   47篇
  2002年   28篇
  2001年   46篇
  2000年   36篇
  1999年   39篇
  1998年   64篇
  1997年   64篇
  1996年   76篇
  1995年   58篇
  1994年   54篇
  1993年   59篇
  1992年   33篇
  1991年   37篇
  1990年   42篇
  1989年   61篇
  1988年   50篇
  1987年   44篇
  1986年   44篇
  1985年   33篇
  1984年   26篇
  1983年   19篇
  1982年   26篇
  1981年   20篇
  1980年   14篇
  1979年   9篇
  1978年   7篇
  1977年   12篇
  1976年   14篇
  1975年   15篇
排序方式: 共有2012条查询结果,搜索用时 15 毫秒
41.
A case of myxoid leiomyoma of deep soft tissue is described. The patient was a 42-year-old woman who presented with menorrhagia, and an ischiorectal mass was identified. A total hysterectomy was performed, and the mass was removed. On gross examination, the mass was 6cm x 5cm x 4cm and had a mucoid cut surface. Histologic examination revealed a myxoid leiomyoma with abundant intracellular corpora amylacea (CA). An infarcted leiomyoma was present in the hysterectomy specimen. The patient remains well, with no evidence of recurrence 3 years after surgery. Leiomyomas of deep soft tissue are rare, and, to our knowledge, none have been described containing CA.  相似文献   
42.
43.
44.
45.
46.
47.
48.
49.
BackgroundPeriodontal disease is a major cause of tooth loss. Few studies have evaluated the residual area of the periodontal ligament in extracted teeth and, to the best of our knowledge, none from Latin America have done so regarding indications for extraction. The aim of this study was to evaluate the residual periodontal ligament (RPL) with respect to indication for extraction in a sample of teeth from a Brazilian Public Health Service district.Materials and methodsAll teeth extracted within the Public Health Service district of Santa Maria, Brazil, over a 5-month period were requested for analysis. A total of 414 teeth eligible for measurement were stained and evaluated for RPL using a stereo microscope. Participating Public Health Service dentists completed a questionnaire detailing demographic variables and indication for each extracted tooth. The percentage of RPL was determined for each tooth. Comparisons of RPL between teeth extracted on periodontal versus other indications were made using the Mann-Whitney test.ResultsRPL averaged 34.8% for teeth extracted on periodontal indications versus 79.5% for other teeth (P ≤ 0.001). When considering teeth with an RPL ≥ 30% as possible to maintain, 189 (76%) of the teeth extracted on periodontal indications could have been maintained. When RPL cut-off limits of ≥ 40% or ≥ 50% are applied, 93 (37%) and 43 (17%) teeth, respectively, could have been maintained.ConclusionThis study suggests that strictly based on RPL, a large number of teeth extracted on periodontal indications conceivably could be maintained.Key words: Cross-sectional studies, Prognosis, Tooth extraction, Tooth loss  相似文献   
50.
ObjectiveThis study assessed levels of anxiety, depression, and stress among family caregivers of children and adolescents with mental disorders in Ghana and the implication on medication adherence.DesignA cross-sectional study.SettingThe study was conducted at the outpatient departments of the three main public psychiatric hospitals in Ghana.ParticipantsTwo hundred and ten non-paid family caregivers of children and adolescents with mental disorders were recruited for this study.Main Outcome MeasureThe study assessed symptoms of anxiety, depression and stress among the caregivers and estimated caregiver-reported medication adherence.ResultsAbout 56.2%, 66.2% and 78% of the caregivers experienced severe anxiety, severe depression and moderate to severe stress symptoms respectively. From the multiple logistic regression model, while anxiety was significantly affected by religion and education, depression was influenced by sex, age, marital status, proximity to facility, and employment status. Female caregivers had about four times higher odds of being depressed compared to male caregivers (aOR: 3.81, 95% CI: 1.66 – 8.75). The caregiver-reported medication adherence was 11.9%. Anxiety was significantly predictive of medication adherence.ConclusionMost family caregivers of children and adolescents with mental disorders experienced symptoms of anxiety, depression and stress with anxiety having implications for medication adherence. The study findings underscore the need to consider psychological characteristics of caregivers and the provision of mental health support for them, as part of the routine health care for children and adolescents with mental disorders.FundingNone indicated  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