全文获取类型
收费全文 | 20146篇 |
免费 | 1446篇 |
国内免费 | 109篇 |
专业分类
耳鼻咽喉 | 193篇 |
儿科学 | 675篇 |
妇产科学 | 457篇 |
基础医学 | 2829篇 |
口腔科学 | 358篇 |
临床医学 | 1786篇 |
内科学 | 4957篇 |
皮肤病学 | 501篇 |
神经病学 | 2058篇 |
特种医学 | 478篇 |
外科学 | 2039篇 |
综合类 | 145篇 |
一般理论 | 16篇 |
预防医学 | 1750篇 |
眼科学 | 446篇 |
药学 | 1514篇 |
中国医学 | 56篇 |
肿瘤学 | 1443篇 |
出版年
2023年 | 210篇 |
2022年 | 154篇 |
2021年 | 850篇 |
2020年 | 467篇 |
2019年 | 716篇 |
2018年 | 796篇 |
2017年 | 523篇 |
2016年 | 604篇 |
2015年 | 728篇 |
2014年 | 889篇 |
2013年 | 1250篇 |
2012年 | 1641篇 |
2011年 | 1699篇 |
2010年 | 1024篇 |
2009年 | 796篇 |
2008年 | 1303篇 |
2007年 | 1316篇 |
2006年 | 1171篇 |
2005年 | 1124篇 |
2004年 | 951篇 |
2003年 | 862篇 |
2002年 | 793篇 |
2001年 | 124篇 |
2000年 | 90篇 |
1999年 | 128篇 |
1998年 | 142篇 |
1997年 | 110篇 |
1996年 | 65篇 |
1995年 | 78篇 |
1994年 | 73篇 |
1993年 | 71篇 |
1992年 | 54篇 |
1991年 | 56篇 |
1990年 | 56篇 |
1989年 | 33篇 |
1988年 | 33篇 |
1987年 | 37篇 |
1986年 | 30篇 |
1985年 | 41篇 |
1984年 | 52篇 |
1983年 | 49篇 |
1982年 | 51篇 |
1981年 | 45篇 |
1980年 | 47篇 |
1978年 | 34篇 |
1977年 | 34篇 |
1975年 | 27篇 |
1974年 | 24篇 |
1973年 | 24篇 |
1972年 | 22篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
The Polish dietary supplement market is growing steadily. However, even though these products may have an impact on health they are not as strongly regulated as pharmaceuticals. In 2016/17 the introduction of new regulations covering the marketing of dietary supplements in Poland was proposed. This article briefly describes the Polish market for dietary supplements and assesses the benefits and risks associated with its development. A range of potential legislative changes, such as a total ban on dietary supplements, a ban on using the images and recommendations of authoritative entities, increased fines for breaking the law, and other measures are under consideration. We describe the advantages (e.g., better customer protection, and the limitation of inappropriate, misleading advertising) and disadvantages (e.g., a decrease in product innovation, deterioration in product offerings, and rises in product prices) of the proposed changes. As a European Union member, Poland adopts EU law, but EU directives have only harmonized some issues relating to dietary supplement marketing, other key aspects remaining within the competence of member states, but it is noted that some proposed changes in Polish law (e.g., an advertising ban) are so strict that they are unlikely to be acceptable to the EU. 相似文献
7.
8.
Lander Pea Merino Ricardo Lpez Almaraz Aitor Fernndez de Larrinoa Marta Rubio Lombraa Maria Rosario Gonzlez‐Hermosa 《Pediatric dermatology》2019,36(6):965-966
Multifocal lymphangioendotheliomatosis with thrombocytopenia (MLT) is an extremely rare recently described disorder characterized by diffuse congenital skin and gastrointestinal vascular lesions that may be associated with gastrointestinal bleeding and thrombocytopenia. We herein present a case report of multifocal lymphangioendotheliomatosis without thrombocytopenia or extensive extracutaneous involvement (gastrointestinal bleeding). Given the high morbidity and mortality associated with this disease, it is important for clinicians to recognize this disorder in order to select the most appropriate therapeutic approach. 相似文献
9.
Luis Veloza Cristina Teixido Natalia Castrejon Fina Climent Ana Carri Marta Marginet Davide Soldini Blanca Gonzlez‐Farr Inmaculada Ribera‐Cortada Armando Lopez‐Guillermo Eva Gonzlez‐Barca Adriana Sierra Mileyka Herrera Cndida Gmez Adriana Garcia Olga Balagu Elias Campo Antonio Martinez 《Histopathology》2019,75(6):799-812
10.
José Antonio Pereira Miguel Pera Manuel López-Cano Marta Pascual Sandra Alonso Silvia Salvans Marta Jiménez-Toscano Alba González-Martín Luis Grande-Posa 《Cirugía espa?ola》2019,97(1):20-26