全文获取类型
收费全文 | 192727篇 |
免费 | 34760篇 |
国内免费 | 5429篇 |
专业分类
耳鼻咽喉 | 5486篇 |
儿科学 | 5987篇 |
妇产科学 | 2990篇 |
基础医学 | 8369篇 |
口腔科学 | 2156篇 |
临床医学 | 32283篇 |
内科学 | 53896篇 |
皮肤病学 | 7852篇 |
神经病学 | 17317篇 |
特种医学 | 7641篇 |
外国民族医学 | 17篇 |
外科学 | 45383篇 |
综合类 | 6992篇 |
现状与发展 | 77篇 |
一般理论 | 7篇 |
预防医学 | 9565篇 |
眼科学 | 4517篇 |
药学 | 5258篇 |
31篇 | |
中国医学 | 1865篇 |
肿瘤学 | 15227篇 |
出版年
2024年 | 815篇 |
2023年 | 5378篇 |
2022年 | 2867篇 |
2021年 | 5195篇 |
2020年 | 7549篇 |
2019年 | 3631篇 |
2018年 | 8873篇 |
2017年 | 8631篇 |
2016年 | 9599篇 |
2015年 | 10236篇 |
2014年 | 17724篇 |
2013年 | 17597篇 |
2012年 | 8514篇 |
2011年 | 8733篇 |
2010年 | 12266篇 |
2009年 | 15774篇 |
2008年 | 7964篇 |
2007年 | 6225篇 |
2006年 | 8570篇 |
2005年 | 5872篇 |
2004年 | 4431篇 |
2003年 | 3367篇 |
2002年 | 3230篇 |
2001年 | 4866篇 |
2000年 | 4103篇 |
1999年 | 4412篇 |
1998年 | 4278篇 |
1997年 | 4157篇 |
1996年 | 3876篇 |
1995年 | 3676篇 |
1994年 | 2344篇 |
1993年 | 1852篇 |
1992年 | 1731篇 |
1991年 | 1718篇 |
1990年 | 1318篇 |
1989年 | 1408篇 |
1988年 | 1228篇 |
1987年 | 1034篇 |
1986年 | 1047篇 |
1985年 | 833篇 |
1984年 | 612篇 |
1983年 | 595篇 |
1982年 | 558篇 |
1981年 | 451篇 |
1980年 | 387篇 |
1979年 | 350篇 |
1978年 | 348篇 |
1977年 | 413篇 |
1975年 | 287篇 |
1972年 | 309篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
Peter Stone MD FRNZCOG FRCOG David Cook FRNZCOG MRCOG John Hutton PhD FRNZCOG FRCOG Gordon Purdie BSc Henry Murray MD FRNZCOG MRCOG Lauren Harcourt MPP BA 《The Australian & New Zealand journal of obstetrics & gynaecology》1995,35(1):32-37
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
23.
Alexandros Karabetsos MD Dr ; George Karachalios MD Dr ; Paraskevoula Bourlinou RN Nurse ; Asimina Reppa RN Nurse ; Rozeta Koutri MD Dr ; Androniki Fotiadou MD Dr 《Headache》1997,37(1):12-14
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
24.
25.
26.
27.
28.
29.
在新疆石河子市远郊缺碘地甲病区7~17岁儿童中取样,检测智力、精神运动功能、身高、体重和骨龄,发现精神运动发育障碍和骨龄落后的程度及发生频度明显高于非病区;而智力落后和体格发育落后两区无显著差异。根据这一发现认为在“亚地克病”诊断中,“精神运动发育测验”较“比内测验”更具有特异性和敏感性;建议在“出生、居住于缺碘地甲病区”前提下,将精神运动发育障碍和智力落后并列为主要条件。另根据地克病的分型原则,提出“亚地克病”的分型标准。 相似文献
30.