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   1514篇
  免费   102篇
  国内免费   25篇
儿科学   145篇
妇产科学   21篇
基础医学   149篇
口腔科学   66篇
临床医学   145篇
内科学   357篇
皮肤病学   38篇
神经病学   25篇
特种医学   328篇
外科学   84篇
综合类   23篇
预防医学   62篇
眼科学   16篇
药学   87篇
  1篇
中国医学   1篇
肿瘤学   93篇
  2023年   2篇
  2022年   5篇
  2021年   13篇
  2020年   8篇
  2019年   13篇
  2018年   25篇
  2017年   19篇
  2016年   24篇
  2015年   32篇
  2014年   28篇
  2013年   51篇
  2012年   18篇
  2011年   19篇
  2010年   43篇
  2009年   81篇
  2008年   22篇
  2007年   43篇
  2006年   41篇
  2005年   32篇
  2004年   22篇
  2003年   29篇
  2002年   20篇
  2001年   20篇
  2000年   21篇
  1999年   31篇
  1998年   101篇
  1997年   117篇
  1996年   112篇
  1995年   77篇
  1994年   82篇
  1993年   98篇
  1992年   17篇
  1991年   17篇
  1990年   18篇
  1989年   44篇
  1988年   39篇
  1987年   26篇
  1986年   32篇
  1985年   31篇
  1984年   17篇
  1983年   15篇
  1982年   19篇
  1981年   34篇
  1980年   20篇
  1979年   8篇
  1978年   8篇
  1977年   21篇
  1976年   19篇
  1975年   6篇
  1970年   1篇
排序方式: 共有1641条查询结果,搜索用时 31 毫秒
91.
92.
Locally deranged joint anatomy can predispose to septic arthritis which can be managed by surgical debridement. We present a case of manubriosternal subluxation/dislocation caused by kyphoscoliosis leading to manubriosternal septic arthritis.  相似文献   
93.
94.

Background  

The Dutch Consumer Quality Index Hip Knee Questionnaire (CQI Hip Knee) was used to assess patients' experiences with and evaluations of quality of care after a total hip (THA) or total knee arthroplasty (TKA). The aim of this study is to evaluate the construct validity and internal consistency reliability of this new instrument and to assess its ability to measure differences in quality of care between hospitals.  相似文献   
95.
96.
97.
A baby with unilateral cleft lip, midline cleft palate and hypertelorism developed meningitis in the first 48 h of life. Examination of the nasopharynx showed a soft tissue mass, which was confirmed as a basal encephalocele by computed tomography. There was also congenital hydrocephalus and the corpus callosum was absent. Surgical treatment included repair of the anterior basal skull defect, repair of the lip and palate, and ventriculo-peritoneal shunt. There is currently evidence of developmental delay and right-sided visual impairment due to Morning Glory syndrome. This case demonstrates that basal encephalocele should be considered in any baby with midline facial deformity who develops meningitis.  相似文献   
98.
This study comprised 103 preterm infants with a gestational age less than 33 weeks who were born in Tampere University Hospital and who were followed up to two years of age. Sixty-four perinatal variables were compared to ultrasound findings in the neonatal period and neurologic handicap at the age of two years. Duration of hypocarbia (PCO2 < or = 30 mmHg) during the first 72 h and hyperbilirubinemia (the mean level of serum total bilirubin) at three days of age were independently and significantly related to periventricular leukomalacia, but not directly to cerebral palsy. The only perinatal variables related independently and significantly to cerebral palsy at two years of age were periventricular leukomalacia and ventriculomegaly. According to these results, periventricular leukomalacia was the main predictor of cerebral palsy in preterm infants. In addition to hypocarbia, hyperbilirubinemia may also be involved in the pathogenesis of extensive (severe cystic) periventricular leukomalacia.  相似文献   
99.
Transient evoked otoacoustic emissions (TEOAEs) are low amplitude sound waves produced by the healthy cochlea. They can be recorded with a microphone in the external ear. TEOAEs are abolished by hearing losses of 30 dB or more. The feasibility of using TEOAEs as a screening test for hearing loss in children was studied. TEOAE recordings were attempted in 56 children attending an audiology clinic. Recordings were possible from both ears in 52 children; of these 104 ears, 32 had hearing deficits of 30 dB or more. Hearing status was compared with the results of six TEOAE screening criteria. All criteria had a sensitivity of 1.00. Four standard TEOAE criteria yielded specificities of 0.46-0.58. Two new criteria derived from analysis of limited frequencies from the TEOAE waveform gave specificities of 0.76 and 0.82. It can be concluded that, when appropriate pass/fail criteria are employed, TEOAEs are a feasible screening test in children.  相似文献   
100.
Objective: To ascertain blood lead levels in a sample of preschool children from Fremantle, Western Australia, and to correlate these with possible risk factors.
Methodology The study was a cross-sectional prevalence survey of 120 children from day-care centres and 44 hospital inpatients. Blood lead and ferritin levels were determined and a risk factor questionnaire was completed by parents.
Results Of the 164 children 25.6% had lead levels above the NH&MRC goal (<10μg/dL). Nine of 133 (6.7%) had ferritin levels below 10 μg/L suggesting iron deficiency. Excessive blood lead concentrations as defined by the NH&MRC (>9μg/dL) related to: child's presence during house renovation (OR 3.35, P = 0.007, 95% Cl 1.39-8.81); Aboriginality (OR 6.4, P = 0.008, 95% Cl 1.6-24.9), and, in the 9-24 month age group, inversely to distance between home and a road carrying >7000 vehicles/day (r-0.56, P = 0.009, n = 24).
Conclusions A group of Fremantle children with unacceptably high blood lead levels has been identified. Renovation of older housing and Aboriginality are important risk factors.  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