全文获取类型
收费全文 | 19698篇 |
免费 | 1395篇 |
国内免费 | 51篇 |
专业分类
耳鼻咽喉 | 113篇 |
儿科学 | 563篇 |
妇产科学 | 543篇 |
基础医学 | 2845篇 |
口腔科学 | 355篇 |
临床医学 | 2255篇 |
内科学 | 4057篇 |
皮肤病学 | 333篇 |
神经病学 | 1992篇 |
特种医学 | 610篇 |
外科学 | 1906篇 |
综合类 | 161篇 |
现状与发展 | 1篇 |
一般理论 | 20篇 |
预防医学 | 2107篇 |
眼科学 | 306篇 |
药学 | 1482篇 |
中国医学 | 56篇 |
肿瘤学 | 1439篇 |
出版年
2024年 | 27篇 |
2023年 | 249篇 |
2022年 | 400篇 |
2021年 | 712篇 |
2020年 | 475篇 |
2019年 | 752篇 |
2018年 | 731篇 |
2017年 | 585篇 |
2016年 | 576篇 |
2015年 | 638篇 |
2014年 | 830篇 |
2013年 | 1072篇 |
2012年 | 1703篇 |
2011年 | 1619篇 |
2010年 | 851篇 |
2009年 | 794篇 |
2008年 | 1267篇 |
2007年 | 1302篇 |
2006年 | 1083篇 |
2005年 | 1153篇 |
2004年 | 987篇 |
2003年 | 843篇 |
2002年 | 809篇 |
2001年 | 160篇 |
2000年 | 98篇 |
1999年 | 131篇 |
1998年 | 135篇 |
1997年 | 133篇 |
1996年 | 83篇 |
1995年 | 76篇 |
1994年 | 75篇 |
1993年 | 61篇 |
1992年 | 62篇 |
1991年 | 48篇 |
1990年 | 65篇 |
1989年 | 42篇 |
1988年 | 53篇 |
1987年 | 51篇 |
1986年 | 50篇 |
1985年 | 39篇 |
1984年 | 28篇 |
1983年 | 26篇 |
1982年 | 34篇 |
1981年 | 27篇 |
1980年 | 17篇 |
1979年 | 20篇 |
1976年 | 14篇 |
1974年 | 14篇 |
1972年 | 16篇 |
1971年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
Nausea and vomiting of pregnancy (NVP) affects 80% of pregnancies. Its severe form, hyperemesis gravidarum (HG), results in dehydration, electrolyte imbalance, the need for hospitalisation and can, rarely, be fatal. This was a prospective, open-labelled, controlled, interventional study to evaluate the effectiveness of pre-emptive treatment of NVP symptoms in women who experienced severe NVP or HG in their previous pregnancy. Twenty-five women who reported severe symptoms of NVP with or without HG in their previous pregnancy were recruited and counselled to commence the use of antiemetics as soon as they became aware of the present pregnancy, and no later than the beginning of symptoms. They were followed-up prospectively through the index pregnancy for symptoms of NVP, and were counselled continuously as to how to modify antiemetic doses based on symptoms. A comparison group consisted of randomly selected women also counselled by us for NVP, who had also had severe NVP in the previous pregnancy, but who did not call before a planned pregnancy and thus could not be offered pre-emptive therapy. The recruited women commenced pre-emptive drug therapy for NVP before conception or up to 7 weeks' gestation, before the appearance of NVP symptoms in all cases. In comparison to the previous pregnancy, only eight of these 18 women experienced a HG again in the index pregnancy (P = 0.01). The majority of study the women had an improvement in severity of NVP symptoms compared to the previous pregnancy. In the comparison group (n = 35), symptoms in the index pregnancy remained severe in 28 cases (80%), decreased to moderate in six (16.6%) and decreased to mild in five cases (13.9%). There were five cases of HG in the previous pregnancy and three in the index pregnancy. The pre-emptive group was improved significantly compared to the control group (P = 0.01). Pre-emptive symptom management appears to be effective in preventing severe NVP in general, and HG in particular. Women who have experienced severe NVP in a previous pregnancy may benefit from taking antiemetics before, or immediately at the start of symptoms in a subsequent pregnancy. 相似文献
92.
93.
94.
Michael Patrick Lux Sven Ackermann Mayada R Bani Caroline Nestle-Kr?mling Timm O Goecke Dieter Niederacher R Bodden-Heidrich Hans-Georg Bender Matthias Wilhelm Beckmann Peter Andreas Fasching 《European journal of cancer prevention》2005,14(6):503-511
INTRODUCTION: Some 5-10% of all cases of breast cancer and ovarian cancer have a hereditary genesis. In the setting of an interdisciplinary cancer genetics clinic, a study of the age at which patients first take advantage of early cancer detection (ECD) facilities was conducted in order to assess the influence of familial risk on health issues. METHODS: The study included 556 women who fulfilled the inclusion criteria (IC) for genetic analysis of the BRCA1 and BRCA2 genes, as well as 205 who did not meet these criteria but attended the primary consultation. RESULTS: Consulters who met the inclusion criteria took advantage of nearly all methods of ECD at an earlier time than women who did not. A comparison of consulters with or without breast cancer showed that those without breast cancer participated in all methods of ECD at an earlier time. CONCLUSION: Methods of improving and increasing participation in ECD facilities, and of encouraging women who are at risk to start on such programs at a younger age, need to be discussed. In this study, familial risk already resulted in a younger age of uptake of ECD facilities. 相似文献
95.
96.
97.
98.
99.
Simon P. Jochems Karin de Ruiter Carla Solrzano Astrid Voskamp Elena Mitsi Elissavet Nikolaou Beatriz F. Carniel Sherin Pojar Esther L. German Jesús Rein Alessandra Soares-Schanoski Helen Hill Rachel Robinson Angela D. Hyder-Wright Caroline M. Weight Pascal F. Durrenberger Robert S. Heyderman Stephen B. Gordon Hermelijn H. Smits Britta C. Urban Jamie Rylance Andrea M. Collins Mark D. Wilkie Lepa Lazarova Samuel C. Leong Maria Yazdanbakhsh Daniela M. Ferreira 《The Journal of clinical investigation》2022,132(11)
100.
Milena Kohn Marc Delord Maureen Chbat Amina Guemriche Fatiha Merabet Anne-Laure Roupie Naelle Lombion Hassan Farhat Thomas Longval Aurlie Cabannes-Hamy Juliette Lambert Stphanie Marque-Juillet Victoria Raggueneau Jennifer Osman Marc Spentchian Sophie Rigaudeau Philippe Rousselot Caroline Besson 《Haematologica》2022,107(6):1454