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   149063篇
  免费   31139篇
  国内免费   2388篇
耳鼻咽喉   5153篇
儿科学   5343篇
妇产科学   2366篇
基础医学   2881篇
口腔科学   1462篇
临床医学   26492篇
内科学   46849篇
皮肤病学   7426篇
神经病学   14624篇
特种医学   6293篇
外科学   40718篇
综合类   227篇
现状与发展   72篇
预防医学   6918篇
眼科学   3311篇
药学   850篇
中国医学   6篇
肿瘤学   11599篇
  2024年   684篇
  2023年   4778篇
  2022年   1174篇
  2021年   3037篇
  2020年   5997篇
  2019年   2114篇
  2018年   7332篇
  2017年   7297篇
  2016年   8367篇
  2015年   8359篇
  2014年   15420篇
  2013年   15525篇
  2012年   5321篇
  2011年   5319篇
  2010年   10263篇
  2009年   14166篇
  2008年   5651篇
  2007年   3877篇
  2006年   6357篇
  2005年   3639篇
  2004年   2912篇
  2003年   1895篇
  2002年   1986篇
  2001年   3769篇
  2000年   2983篇
  1999年   3189篇
  1998年   3628篇
  1997年   3458篇
  1996年   3362篇
  1995年   3208篇
  1994年   1941篇
  1993年   1561篇
  1992年   1368篇
  1991年   1401篇
  1990年   1051篇
  1989年   1174篇
  1988年   1012篇
  1987年   847篇
  1986年   881篇
  1985年   710篇
  1984年   543篇
  1983年   518篇
  1982年   514篇
  1981年   403篇
  1980年   361篇
  1979年   307篇
  1978年   329篇
  1977年   396篇
  1975年   277篇
  1972年   302篇
排序方式: 共有10000条查询结果,搜索用时 0 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