全文获取类型
收费全文 | 163802篇 |
免费 | 7248篇 |
国内免费 | 543篇 |
专业分类
耳鼻咽喉 | 2667篇 |
儿科学 | 4843篇 |
妇产科学 | 3702篇 |
基础医学 | 22236篇 |
口腔科学 | 5773篇 |
临床医学 | 10545篇 |
内科学 | 39695篇 |
皮肤病学 | 5286篇 |
神经病学 | 13485篇 |
特种医学 | 3725篇 |
外国民族医学 | 2篇 |
外科学 | 19374篇 |
综合类 | 1021篇 |
现状与发展 | 1篇 |
一般理论 | 46篇 |
预防医学 | 16216篇 |
眼科学 | 3538篇 |
药学 | 11576篇 |
中国医学 | 924篇 |
肿瘤学 | 6938篇 |
出版年
2023年 | 1088篇 |
2022年 | 1890篇 |
2021年 | 4530篇 |
2020年 | 2263篇 |
2019年 | 4226篇 |
2018年 | 6028篇 |
2017年 | 3578篇 |
2016年 | 3455篇 |
2015年 | 3891篇 |
2014年 | 5189篇 |
2013年 | 7374篇 |
2012年 | 11502篇 |
2011年 | 12347篇 |
2010年 | 6517篇 |
2009年 | 5116篇 |
2008年 | 9518篇 |
2007年 | 10057篇 |
2006年 | 9250篇 |
2005年 | 9256篇 |
2004年 | 8271篇 |
2003年 | 7665篇 |
2002年 | 7101篇 |
2001年 | 4495篇 |
2000年 | 5023篇 |
1999年 | 3979篇 |
1998年 | 907篇 |
1997年 | 690篇 |
1996年 | 583篇 |
1995年 | 518篇 |
1994年 | 405篇 |
1993年 | 340篇 |
1992年 | 1537篇 |
1991年 | 1281篇 |
1990年 | 1149篇 |
1989年 | 944篇 |
1988年 | 836篇 |
1987年 | 764篇 |
1986年 | 765篇 |
1985年 | 658篇 |
1984年 | 479篇 |
1983年 | 406篇 |
1979年 | 446篇 |
1975年 | 304篇 |
1974年 | 395篇 |
1973年 | 392篇 |
1972年 | 338篇 |
1971年 | 367篇 |
1970年 | 328篇 |
1969年 | 353篇 |
1968年 | 315篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Maria Gonzalez-Cao Cristina Carrera Juan Francisco Rodriguez Moreno Pedro Rodríguez-Jiménez Mónica Antoñanzas Basa Rosa Feltes Ochoa Teresa Puertolas Eva Muñoz-Couselo José Luis Manzano Ivan Marquez-Rodas Juan Martín-Liberal Ainara Soria Pilar Lopez Criado Almudena Garcia-Castaño Aram Boada Pablo Ayala de Miguel Susana Puig Guillermo Crespo Alfonso Berrocal 《Journal of the American Academy of Dermatology》2021,84(5):1412-1415
22.
23.
Bielik Peter Bonczek Ondřej Krejčí Přemysl Zeman Tomáš Izakovičová-Hollá Lydie Šoukalová Jana Vaněk Jiří Vojtěšek Bořivoj Lochman Jan Balcar Vladimir J. Šerý Omar 《Clinical oral investigations》2022,26(12):7045-7055
Clinical Oral Investigations - The aim of this study was the analysis of WNT10A variants in seven families of probands with various forms of tooth agenesis and self-reported family history of... 相似文献
24.
Sania Amr Magdy Garas Dina N. K. Boulos Doa’a A. Saleh Irene A. Jillson Christopher A. Loffredo 《Journal of substance use》2019,24(3):341-345
Background: Egyptian street youth use substances including tobacco, illicit drugs, and pharmaceutical drugs. To understand the circumstances, including adverse childhood experiences, that place adolescents at risk for engaging in substance use, we conducted in-depth interviews among a sample of Egyptian street children. Methods: From youth residing at or attending Caritas, a non-profit organization, which provides shelter and education to street youth, seven girls and twelve boys, aged 12–18 years, participated in open-ended, in-depth interviews. Results: Eight out of the 19 participants reported family history (early exposure) to substance use; and seven of them were initiated by either a family member (sibling), friend or coworker. Most of the participants reported a history of conflict with or abuse (verbal or physical) by their parents or siblings, or stressful situations at home; they used substance(s) to alleviate their stress. Few attended school, and some were forced to work and help their family. Conclusions: Among Egyptian youth, adverse childhood experiences, such as poverty, child abuse, and family substance use, challenge somewhat susceptible youths and lead them to the path of substance use and addiction. Prevention intervention should be multifaceted, culturally adaptable, and primarily targeting the social environment during childhood. 相似文献
25.
Estefany I. Medina-Reyes Carolina Rodríguez-Ibarra Daniel Díaz-Urbina Alejandro Déciga-Alcaraz Normal L. Delgado-Buenrostro Yolanda I. Chirino José Pedraza-Chaverri 《Journal of applied toxicology : JAT》2022,42(8):1411-1419
Food-grade titanium dioxide (E171) is widely used as a food additive, and it is known that after oral consumption, E171 is translocated into the bloodstream reaching the highest titanium level at 6 h. E171 is accumulated in some organs triggering toxicity, but the effects on the blood parameters after oral consumption have been less studied. Recently, evidence shows that oral exposure to E171 induces behavioral signs of anxiety and depression. The relation between blood alterations and psychiatric disorders has been previously demonstrated. However, the oral exposure to E171 effects on alterations in blood parameters and effects linked to alterations in animal behavior has not been explored. In this short communication, we aimed to investigate the effects of E171 on specific blood parameters (hematocrit, hemoglobin, number of erythrocytes, and leukocytes) and anxiety and compulsive-like behavior in males and females orally exposed to ~5 mg/kg for 4 weeks. The results showed that E171 decreased hematocrit and hemoglobin in male but not in female mice while leukocyte and erythrocyte count remained unaltered. Oral consumption of E171 decreased the levels of anxiety-like behavior in females but not in male mice, while compulsive-like behavior was increased in both male and female mice. 相似文献
26.
27.
Megan L. Robbins Robert C. Wright Ana María López Karen Weihs 《Journal of psychosocial oncology》2019,37(2):160-177
AbstractObjectives: This study examined word use as an indicator of interpersonal positive reframing in daily conversations of couples coping with breast cancer and as a predictor of stress.Design: The Electronically Activated Recorder (EAR) and Linguistic Inquiry and Word Count (LIWC) were used to examine naturally occurring word use conceptually linked to positive reframing (positive emotion, negative emotion, and cognitive processing words).Sample: Fifty-two couples coping with breast cancer.Methods: Couples wore the EAR, a device participants wear, that audio-recorded over one weekend (>16,000 sound files), and completed self-reports of positive reframing (COPE) and stress (Perceived Stress Scale). LIWC, a software program, measured word use.Findings: Both partners’ word use (i.e., positive emotion and cognitive processing words) was associated with their own reported positive reframing, and spouses’ word use was also indicative of patients’ positive reframing. Results also revealed that, in general, words indicating positive reframing predicted lower levels of stress.Conclusions: Findings supported the hypothesis that partners—and particularly spouses of breast cancer patients—may assist each other’s coping by positively reframing the cancer experience and other negative experiences in conversation. 相似文献
28.
29.
Tormo Nuria Giménez Estela Martínez-Navarro María Albert Eliseo Navalpotro David Torres Ignacio Gimeno Concepción Navarro David 《European journal of clinical microbiology & infectious diseases》2022,41(4):657-662
European Journal of Clinical Microbiology & Infectious Diseases - We compared the performance of an in-house-developed flow cytometry assay for intracellular cytokine staining (FC-ICS) and a... 相似文献
30.