全文获取类型
收费全文 | 27124篇 |
免费 | 6274篇 |
国内免费 | 155篇 |
专业分类
耳鼻咽喉 | 676篇 |
儿科学 | 1008篇 |
妇产科学 | 801篇 |
基础医学 | 1148篇 |
口腔科学 | 2810篇 |
临床医学 | 4630篇 |
内科学 | 6335篇 |
皮肤病学 | 541篇 |
神经病学 | 2201篇 |
特种医学 | 1227篇 |
外科学 | 4457篇 |
综合类 | 158篇 |
现状与发展 | 12篇 |
一般理论 | 3篇 |
预防医学 | 3075篇 |
眼科学 | 812篇 |
药学 | 610篇 |
1篇 | |
中国医学 | 34篇 |
肿瘤学 | 3014篇 |
出版年
2024年 | 167篇 |
2023年 | 1164篇 |
2022年 | 491篇 |
2021年 | 886篇 |
2020年 | 1364篇 |
2019年 | 674篇 |
2018年 | 1555篇 |
2017年 | 1453篇 |
2016年 | 1684篇 |
2015年 | 1724篇 |
2014年 | 2221篇 |
2013年 | 2672篇 |
2012年 | 1262篇 |
2011年 | 1175篇 |
2010年 | 1637篇 |
2009年 | 2144篇 |
2008年 | 1097篇 |
2007年 | 860篇 |
2006年 | 964篇 |
2005年 | 735篇 |
2004年 | 608篇 |
2003年 | 480篇 |
2002年 | 421篇 |
2001年 | 483篇 |
2000年 | 363篇 |
1999年 | 456篇 |
1998年 | 533篇 |
1997年 | 507篇 |
1996年 | 551篇 |
1995年 | 414篇 |
1994年 | 317篇 |
1993年 | 276篇 |
1992年 | 206篇 |
1991年 | 191篇 |
1990年 | 178篇 |
1989年 | 185篇 |
1988年 | 150篇 |
1987年 | 155篇 |
1986年 | 131篇 |
1985年 | 119篇 |
1984年 | 96篇 |
1983年 | 108篇 |
1982年 | 96篇 |
1981年 | 89篇 |
1980年 | 58篇 |
1979年 | 64篇 |
1978年 | 43篇 |
1977年 | 59篇 |
1976年 | 44篇 |
1975年 | 44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.
Maaike van Gerwen MD Naomi Alpert MS Raja Flores MD Emanuela Taioli MD PhD 《American journal of industrial medicine》2020,63(2):115-120
The association between asbestos exposure, mainly in occupational settings, and malignant mesothelioma has been well established; this has prompted several countries to establish mesothelioma epidemiologic surveillance programs often at the request of national agencies. This review compares currently existing mesothelioma registries worldwide to develop a concept model for a US real-time case capture mesothelioma registry. Five countries were identified with a mesothelioma specific registry, including Italy, France, UK, Australia, and South Korea. All, except the UK, used interviews to collect exposure data. Linkage with the national death index was available or was in future plans for all registries. The registries have limited information on treatment, quality of life, and other patient-centered outcomes such as symptoms and pain management. To thoroughly collect exposure data, “real-time” enrollment is preferable; to maximize the capture of mesothelioma cases, optimal coverage, and a simplified consent process are needed. 相似文献
6.
Chie Teramoto PHN RN MS Satoko Nagata PhD PHN RN Reiko Okamoto PhD PHN RN Ruriko Suzuki PHN RN MS Emiko Kishi PhD PHN RN Michie Nomura DSN PHN RN Noriko Jojima PHN RN MS Masumi Nishida PhD PHN RN Keiko Koide PhD PHN RN Emiko Kusano PhD PHN RN Saori Iwamoto PhD PHN RN Sachiyo Murashima PhD PHN RN 《Public health nursing (Boston, Mass.)》2015,32(6):654-661
7.
Fayiqa Ahamed Bahkir Srinivasan Subramanian Grandee 《Indian journal of ophthalmology》2020,68(11):2378
Purpose:Since the declaration of the lockdown due to COVID-19, the usage of digital devices has gone up across the globe, resulting in a challenge for the visual systems of all ages. The purpose of this study is to assess the impact of the lockdown on digital device usage, and consequently, the ocular surface health implications and circadian rhythm abnormalities related to digital eye strain.Methods:An open online survey was sent through various social media platforms and was open for a period of 2 weeks.Results:A total of 407 usable responses were obtained; the average age of respondents was 27.4 years. Typically, 93.6% of respondents reported an increase in their screen time since the lockdown was declared. The average increase in digital device usage was calculated at about 4.8 ± 2.8 h per day. The total usage per day was found to be 8.65 ± 3.74 hours. Sleep disturbances have been reported by 62.4% of people. Typically, 95.8% of respondents had experienced at least one symptom related to digital device usage, and 56.5% said that the frequency and intensity of these symptoms increased since the lockdown was declared.Conclusion:The study highlighted the drastic increase in use of digital devices after the initiation of the COVID-19 lockdown, and along with it, the slow deterioration of ocular health across all age groups. Awareness about prevention of digital eye strain should be stressed, and going forward, measures to bring these adverse effects to a minimum should be explored. 相似文献
8.
9.
10.