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   151731篇
  免费   31277篇
  国内免费   2405篇
耳鼻咽喉   5160篇
儿科学   5366篇
妇产科学   2395篇
基础医学   3245篇
口腔科学   1531篇
临床医学   26725篇
内科学   47323篇
皮肤病学   7445篇
神经病学   14803篇
特种医学   6750篇
外科学   41307篇
综合类   234篇
现状与发展   72篇
预防医学   6974篇
眼科学   3352篇
药学   932篇
中国医学   7篇
肿瘤学   11792篇
  2024年   691篇
  2023年   4834篇
  2022年   1271篇
  2021年   3198篇
  2020年   6070篇
  2019年   2214篇
  2018年   7463篇
  2017年   7391篇
  2016年   8485篇
  2015年   8462篇
  2014年   15549篇
  2013年   15674篇
  2012年   5570篇
  2011年   5551篇
  2010年   10383篇
  2009年   14258篇
  2008年   5810篇
  2007年   4039篇
  2006年   6472篇
  2005年   3737篇
  2004年   2986篇
  2003年   1966篇
  2002年   2077篇
  2001年   3785篇
  2000年   2994篇
  1999年   3194篇
  1998年   3639篇
  1997年   3456篇
  1996年   3361篇
  1995年   3208篇
  1994年   1938篇
  1993年   1561篇
  1992年   1371篇
  1991年   1405篇
  1990年   1053篇
  1989年   1172篇
  1988年   1013篇
  1987年   849篇
  1986年   880篇
  1985年   710篇
  1984年   546篇
  1983年   519篇
  1982年   515篇
  1981年   401篇
  1980年   364篇
  1979年   309篇
  1978年   330篇
  1977年   401篇
  1975年   278篇
  1972年   304篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Summary: This is the first report of the largest study of blood pressure measurement in pregnancy in a New Zealand population using standardized definitions and methodology. Over 3,800 women who delivered in an 8-month period in the Wellington region were included in the study. Blood pressure measurement and the presence of oedema and proteinuria were recorded from booking until delivery and in the puerperium. Only 2.7% of women were unable to be contacted after delivery for details on outcomes. The results established normal ranges for blood pressure throughout pregnancy. The data show that Mood pressure greater than 140/90 until 35 weeks' gestation is outside 2 standard deviations at all gestations and justifies using these measurements as the definition of hypertension in pregnancy. The fall in blood pressure in the 2nd trimester was less than 1 mm Ffg per week in both the systolic and diastolic pressures. This fall was smaller than previously recorded in other studies. Gestational hypertension was the commonest blood pressure abnormality occurring in 15.2% of the population. This represented 69% of the pregnant women with a hypertensive disorder. The overall incidence of both gestational hypertension and preeclampsia was 18.5% which is higher than reported in other parts of the world. In this study obesity was significantly associated with hypertensive disorders in pregnancy. An arm circumference of >33 cm, one of the measurements of obesity, was found in 6.8% of the study population. Even after the effect of arm circumference was taken into account, hypertensive disorders were also more common in Pacific Island women. Ankle oedema was significantly associated with the development of both gestational hypertension and preeclampsia but the incidence of oedema was noted in only 11.9% of the subjects.  相似文献   
22.
The efficacy and safety of ketoprofen and paracetamol were compared for the treatment of acute migraine in a randomized, double-blind study of 64 patients. Thirty-four patients received ketoprofen 100 mg intramuscularly, and 30 patients received paracetamol 500 mg intramuscularly. Partial or complete relief of pain and other symptoms was achieved 15 to 20 minutes after administration in the ketoprofen group and within 35 minutes in the paracetamol group. Complete relief of pain was achieved within 30 to 40 minutes after ketoprofen in 28 patients (82.5%) compared to 5 patients (17.5%) in the paracetamol group. Six of the patients treated with ketoprofen needed a second dose for complete relief of pain during the 4-hour follow-up period. Side effects were rare and minimal. Our findings suggest that ketoprofen produced statistically significant benefit in the treatment of acute migraine.  相似文献   
23.
24.
25.
26.
27.
28.
29.
30.
This paper reports the proceedings of the discussion panel assigned to look at clinical aspects of quality in emergency medicine. One of the seven stated objectives of the Academic Emergency Medicine consensus conference on quality in emergency medicine was to educate emergency physicians regarding quality measures and quality improvement as essential aspects of the practice of emergency medicine. Another topic of interest was a discussion of the value of information technology in facilitating quality care in the clinical practice of emergency medicine. It is important to note that this is not intended to be a comprehensive review of this extensive topic, but instead is designed to report the discussion that occurred at this session of the consensus conference.  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