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   39786篇
  免费   2682篇
  国内免费   112篇
耳鼻咽喉   418篇
儿科学   1326篇
妇产科学   1072篇
基础医学   5472篇
口腔科学   655篇
临床医学   6235篇
内科学   7298篇
皮肤病学   659篇
神经病学   3649篇
特种医学   738篇
外科学   3945篇
综合类   482篇
一般理论   60篇
预防医学   4930篇
眼科学   479篇
药学   2333篇
中国医学   69篇
肿瘤学   2760篇
  2023年   214篇
  2022年   395篇
  2021年   822篇
  2020年   505篇
  2019年   828篇
  2018年   950篇
  2017年   669篇
  2016年   704篇
  2015年   901篇
  2014年   1258篇
  2013年   1890篇
  2012年   2806篇
  2011年   2980篇
  2010年   1619篇
  2009年   1352篇
  2008年   2681篇
  2007年   2693篇
  2006年   2717篇
  2005年   2564篇
  2004年   2431篇
  2003年   2317篇
  2002年   2165篇
  2001年   364篇
  2000年   292篇
  1999年   408篇
  1998年   449篇
  1997年   404篇
  1996年   371篇
  1995年   325篇
  1994年   308篇
  1993年   277篇
  1992年   238篇
  1991年   201篇
  1990年   223篇
  1989年   207篇
  1988年   161篇
  1987年   184篇
  1986年   153篇
  1985年   189篇
  1984年   222篇
  1983年   215篇
  1982年   225篇
  1981年   183篇
  1980年   179篇
  1979年   143篇
  1978年   115篇
  1977年   122篇
  1976年   110篇
  1975年   103篇
  1974年   106篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
71.
Fear of falling, defined as a lack of self-confidence that one may avoid falls while doing everyday activities, may have serious consequences for elderly people. This article examines the prevalence, risk factors, and consequences of fear of falling in the elderly population; methods for assessing those fears; and suggests evidence-based interventions. Incorporating successful strategies into programs to reduce falling can result in improved patient outcomes as well as decreased healthcare utilization and costs.  相似文献   
72.
73.
OBJECTIVES: To determine if experienced clinical educators (CEs) can improve their teaching by incorporating 4 literature-based teaching methods into their instruction. METHODS: We trained 7 experienced CEs on the teaching methods during a monthly faculty development program. Each CE recorded use of these methods during 10 months on a personal digital assistant. We compared the CEs' teaching evaluations with those of nonparticipating faculty by analysis of variance at baseline, during the study period, and for 1 year after the study. RESULTS: Reported use of 2 teaching methods (priming and feedback) increased significantly over use at baseline; use of 2 other methods (teaching in the patient's presence and 1-2 focal teaching points) remained constant. Scores on the CEs' teaching evaluations were significantly higher during the study period on 1 item, whereas the comparison group showed no changes. The changes persisted during the follow-up period. CEs reported that the teaching methods focused the learner and teacher, making subsequent encounters more productive. They also found that the act of entering data daily prompted them to reflect on their teaching. CONCLUSIONS: Experienced teachers can be persuaded to incorporate new methods into their daily teaching. Reflection on teaching is enhanced with group support and daily reminders. With these interventions, teaching effectiveness of these experienced educators improved.  相似文献   
74.
75.
76.
PURPOSE: Evaluate the effectiveness of body mass index (BMI) tables placed in exam rooms as an intervention to encourage providers to calculate and record BMI scores in patients' medical records. DESIGN: In a prospective cohort design, medical record data for 276 adult patients at a federally funded community health center in New England were examined from August 2000 to August 2002 following the intervention. METHODS: Prominent, multicolored, laminated BMI tables were posted in the exam rooms of one of the study site's three primary health care teams. Medical record data collected included documentation of BMI calculation in medical records, documentation of an obesity diagnosis, and inclusion of heights and current weights. Frequency distributions were calculated; chi-square tests were used to identify associations. FINDINGS: In contrast to the comparison teams, patients on the intervention team were more likely to have BMI recorded in the medical record. A statistically significant increase in the diagnosis of obesity was observed throughout the health center after the intervention. CONCLUSIONS: Posting BMI tables in exam rooms contributed to increased BMI documentation in patients' medical records.  相似文献   
77.
78.
79.
Brain magnetic resonance images (MRI) of 104 healthy childrenand adolescents, aged 4–18, showed significant effectsof age and gender on brain morphometry. Males had larger cerebral(9%) and cerebellar (8%) volumes (P < 0.0001 and P = 0.008.respectively), which remained significant even after correctionfor height and weight After adjusting for cerebral size, theputamen and globus pallidus remained larger in males, whilerelative caudate size was larger in females. Neither cerebralnor cerebellar volume changed significantly across this agerange. Lateral ventricular volume increased significantly inmales (trend for females), with males showing an increase inslope after age 11. In males only, caudate and putamen decreasedwith age (P = 0.007 and 0.05, respectively). The left lateralventricles and putamen were significantly greater than the rightP = 0.01 and 0.0001, respectively). In contrast, the cerebralhemispheres and caudate showed a highly consistent right greater-than-leftasymmetry (P < 0.0001 for both). All volumes demonstrateda high degree of variability. These findings highlight gender-specificmaturational changes of the developing brain and the need forlarge gender-matched samples in pediatric neuropsychiatric studies.  相似文献   
80.
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