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   1791篇
  免费   190篇
  国内免费   2篇
耳鼻咽喉   17篇
儿科学   73篇
妇产科学   54篇
基础医学   254篇
口腔科学   18篇
临床医学   207篇
内科学   309篇
皮肤病学   11篇
神经病学   229篇
特种医学   96篇
外科学   231篇
综合类   32篇
预防医学   258篇
眼科学   20篇
药学   103篇
中国医学   2篇
肿瘤学   69篇
  2023年   14篇
  2021年   22篇
  2020年   17篇
  2019年   16篇
  2018年   27篇
  2017年   28篇
  2016年   24篇
  2015年   27篇
  2014年   43篇
  2013年   69篇
  2012年   60篇
  2011年   72篇
  2010年   43篇
  2009年   54篇
  2008年   58篇
  2007年   64篇
  2006年   50篇
  2005年   65篇
  2004年   56篇
  2003年   63篇
  2002年   50篇
  2001年   58篇
  2000年   62篇
  1999年   59篇
  1998年   30篇
  1997年   28篇
  1996年   33篇
  1995年   20篇
  1994年   21篇
  1993年   16篇
  1992年   30篇
  1991年   49篇
  1990年   43篇
  1989年   51篇
  1988年   44篇
  1987年   32篇
  1986年   45篇
  1985年   39篇
  1984年   28篇
  1983年   27篇
  1982年   28篇
  1980年   19篇
  1979年   25篇
  1978年   21篇
  1977年   15篇
  1976年   13篇
  1974年   17篇
  1973年   23篇
  1972年   18篇
  1971年   12篇
排序方式: 共有1983条查询结果,搜索用时 15 毫秒
41.
The postoperative development of nonverbal communication was studied in 29 children, aged 18.2 (SD = 11.54) months, who underwent multilobar resection or hemispherectomy for intractable symptomatic infantile spasms (IS). Using the Early Social Communication Scale, the IS subjects had little, if any, social interaction, joint attention or behavior regulation before surgery. After a mean follow-up of 24 months, most of the children continued to have delayed nonverbal communication skills compared to normal children. Seizure-related, surgical and cognitive factors were unrelated to the postsurgical development of nonverbal communication. The children with right-sided surgery had a statistically significant increase in the use of social interaction but not in other gestural behaviors. Removal of the frontal lobe was not related to the nonverbal communication outcome. The study's findings suggest that impaired use of nonverbal communication might be a feature of surgically treated children with medically intractable IS. Copyright Copyright 1999 S. Karger AG, Basel  相似文献   
42.
One hundred thirty-one mothers who were patients of ten physicians were surveyed to determine their compliance with physician-recommended infant feeding practices. For a direct, self-reported measure, the rate of non-compliance was nearly 30 per cent. A second measure, a "compliance score," was computed by comparing mothers' responses to specific questions about the feeding of their babies with their physcians' recommendations for normal, healthy infants. The mean noncompliance rate on this measure was 44 per cent. Differing response patterns regarding specific feeding practices were found for breast-feeding and bottle feeding mothers. To determine selected psychologic factors associated with compliance, health-related attitude and belief scales were originated and validated. Attitudes that "nutrition is important" and a "concern for health" were significantly correlated with the compliance score for breast-feeding mothers.  相似文献   
43.
44.
背景/目的:术前通过血管影像学检查对拟行肝移植术的儿童进行评价存在很大的差异。采用二维多普勒超声扫描(US)、磁共振血管造影术(M R A)和常规血管造影术评价血管变化范围。作者通过比较术前的血管成像结果和术中所见,从而确定这些检查的精确度和有效性。方法:将37例接受尸体  相似文献   
45.
46.
47.
48.
This Conversations Starter article presents a selected research abstract from the 2017 Association of American Medical Colleges Northeastern Region Group on Educational Affairs annual spring meeting. The abstract is paired with the integrative commentary of three experts who shared their thoughts stimulated by the study. Commentators brainstormed “what's next” with learning analytics in medical education, including advancements in interaction metrics and the use of interactivity analysis to deepen understanding of perceptual, cognitive, and social learning and transfer processes.  相似文献   
49.
The New York State Department of Health (NYSDOH) collected information about hospitalized patients with Guillain-Barré syndrome (GBS) during October 2009–May 2010, statewide (excluding New York City), to examine a possible relationship with influenza A(H1N1)pdm09 vaccination. NYSDOH established a Clinical Network of neurologists and 150 hospital neurology units. Hospital discharge data from the Statewide Planning and Research Cooperative System (SPARCS) were used to evaluate completeness of reporting from the Clinical Network. A total of 140 confirmed or probable GBS cases were identified: 81 (58%) from both systems, 10 (7%) from Clinical Network only, and 49 (35%) from SPARCS-only. Capture–recapture methods estimated that 6 cases might have been missed by both systems. Clinical Network median reporting time was 12 days versus 131 days for SPARCS. In public health emergencies in New York State, a Clinical Network may provide timely data, but in our study such data were less complete than traditional hospital discharge data.  相似文献   
50.
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