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   190118篇
  免费   33071篇
  国内免费   2529篇
耳鼻咽喉   5681篇
儿科学   7997篇
妇产科学   3084篇
基础医学   7751篇
口腔科学   2587篇
临床医学   29412篇
内科学   54156篇
皮肤病学   8532篇
神经病学   17129篇
特种医学   7522篇
外科学   46958篇
综合类   1533篇
现状与发展   72篇
一般理论   18篇
预防医学   8973篇
眼科学   4760篇
药学   4919篇
  1篇
中国医学   362篇
肿瘤学   14271篇
  2024年   697篇
  2023年   5072篇
  2022年   2142篇
  2021年   4643篇
  2020年   6854篇
  2019年   3127篇
  2018年   8711篇
  2017年   8269篇
  2016年   9679篇
  2015年   9683篇
  2014年   17380篇
  2013年   17789篇
  2012年   8593篇
  2011年   8521篇
  2010年   12129篇
  2009年   15606篇
  2008年   7839篇
  2007年   6092篇
  2006年   8354篇
  2005年   5443篇
  2004年   4566篇
  2003年   3313篇
  2002年   3203篇
  2001年   4537篇
  2000年   3685篇
  1999年   3781篇
  1998年   3903篇
  1997年   3678篇
  1996年   3580篇
  1995年   3386篇
  1994年   2089篇
  1993年   1684篇
  1992年   1709篇
  1991年   1739篇
  1990年   1407篇
  1989年   1500篇
  1988年   1291篇
  1987年   1088篇
  1986年   1119篇
  1985年   938篇
  1984年   722篇
  1983年   642篇
  1982年   582篇
  1981年   474篇
  1980年   427篇
  1979年   415篇
  1978年   399篇
  1977年   483篇
  1975年   333篇
  1972年   349篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
Acute renal failure (ARF) developed in a 7-week-old infant due to bilateral candidal bezoars (fungal balls) causing obstruction at the pelviureteric junction. The baby was born at term with an appropriate birthweight, and had been treated with broad-spectrum antibiotics for respiratory distress and septicemia during the 1st week of life. Recovery from ARF followed renal decompression with bilateral nephrostomy tube placement and parenteral administration of amphotericin B and 5-flucytosine. Received August 21, 1996; received in revised form and accepted January 3, 1997  相似文献   
23.
24.
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   
25.
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   
26.
27.
28.
29.
30.
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