全文获取类型
收费全文 | 8339篇 |
免费 | 475篇 |
国内免费 | 50篇 |
专业分类
耳鼻咽喉 | 84篇 |
儿科学 | 335篇 |
妇产科学 | 161篇 |
基础医学 | 1076篇 |
口腔科学 | 603篇 |
临床医学 | 720篇 |
内科学 | 1776篇 |
皮肤病学 | 209篇 |
神经病学 | 480篇 |
特种医学 | 612篇 |
外科学 | 915篇 |
综合类 | 62篇 |
一般理论 | 1篇 |
预防医学 | 640篇 |
眼科学 | 190篇 |
药学 | 638篇 |
中国医学 | 57篇 |
肿瘤学 | 305篇 |
出版年
2023年 | 64篇 |
2022年 | 169篇 |
2021年 | 278篇 |
2020年 | 178篇 |
2019年 | 208篇 |
2018年 | 280篇 |
2017年 | 166篇 |
2016年 | 231篇 |
2015年 | 277篇 |
2014年 | 360篇 |
2013年 | 415篇 |
2012年 | 531篇 |
2011年 | 627篇 |
2010年 | 358篇 |
2009年 | 261篇 |
2008年 | 389篇 |
2007年 | 431篇 |
2006年 | 353篇 |
2005年 | 338篇 |
2004年 | 250篇 |
2003年 | 198篇 |
2002年 | 192篇 |
2001年 | 137篇 |
2000年 | 140篇 |
1999年 | 136篇 |
1998年 | 171篇 |
1997年 | 147篇 |
1996年 | 155篇 |
1995年 | 117篇 |
1994年 | 90篇 |
1993年 | 89篇 |
1992年 | 80篇 |
1991年 | 88篇 |
1990年 | 50篇 |
1989年 | 108篇 |
1988年 | 86篇 |
1987年 | 78篇 |
1986年 | 79篇 |
1985年 | 77篇 |
1984年 | 47篇 |
1983年 | 44篇 |
1982年 | 43篇 |
1981年 | 30篇 |
1980年 | 56篇 |
1979年 | 37篇 |
1978年 | 36篇 |
1977年 | 31篇 |
1976年 | 33篇 |
1975年 | 35篇 |
1974年 | 16篇 |
排序方式: 共有8864条查询结果,搜索用时 0 毫秒
71.
The ileoanal J pouch: radiographic evaluation 总被引:1,自引:0,他引:1
Endorectal ileoanal pull-through offers an attractive alternative to proctocolectomy and ileostomy for patients with ulcerative colitis, Gardner syndrome, and familial polyposis. To our knowledge, a careful radiographic analysis of the ileum, ileal pouch, and ileoanal anastomosis after ileoanal pull-through has not been reported. Thirty-two patients with ulcerative colitis, Gardner syndrome, and familial polyposis underwent colectomy, mucosal proctectomy, and endorectal ileoanal pull-through of a 15-cm ileal "J" pouch and loop ileostomy. Twenty-five (78%) of 32 of all the pouches radiographically demonstrated spiral folds extending from the middle of the pouch to the pectinate line. Other radiographic features included a mesenteric mass effect, pseudopolyps, and a central lucency that indicated intrapouch sutures. Radiographs provide useful information in the postoperative management of the ileal pull-through. 相似文献
72.
Osvaldo Santos Miodraga Stefanovska-Petkovska Ana Virgolino Ana Cristina Miranda Joana Costa Elisabete Fernandes Susana Cardoso Antnio Vaz Carneiro 《Nutrients》2021,13(3)
Self-management of health requires skills to obtain, process, understand, and use health-related information. Assessment of adolescents’ functional health literacy requires valid, reliable, and low-burden tools. The main objective of this study was to adapt and study the psychometric properties of the Newest Vital Sign for the Portuguese adolescents’ population (NVS-PTeen). Classic psychometric indicators of reliability and validity were combined with item response theory (IRT) analyses in a cross-sectional survey, complemented with a 3-month test-retest assessment. The NVS-PTeen was self-administered to students enrolled in grades 8 to 12 (12 to 17 years old) in a school setting. Overall, 386 students (191 girls) from 16 classes of the same school participated in the study (mean age = 14.5; SD = 1.5). Internal reliability of the NVS-PTeen was α = 0.60. The NVS-PTeen total score was positively and significantly correlated with Portuguese (r = 0.28) and mathematics scores (r = 0.31), school years (r = 0.31), and age (r = 0.19). Similar to the original scale (for the U.S.), the NVS-PTeen is composed of two dimensions, reading-related literacy and numeracy. Temporal reliability is adequate, though with a learning effect. IRT analyses revealed differences in difficulty and discriminative capacity among items, all with adequate outfit and infit values. Results showed that the NVS-PTeen is valid and reliable, sensible to inter-individual educational differences, and adequate for regular screening of functional health literacy in adolescents. 相似文献
73.
Carla Fernandes Ana F. Santos Marilia Fernandes Antnio J. Santos Kelly Bost Manuela Verissimo 《Nutrients》2021,13(4)
Although there is a large body of research connecting emotion to eating behaviors, little is known about the role of caregivers’ responses to children’s emotions in the context of child feeding. The purpose of this study was to analyze the relation between caregivers’ emotional responsiveness and feeding responsiveness. The mothers of 137 children between 2 and 6 years of age reported on their responses to children’s negative emotions using the Coping with Children’s Negative Emotions Scale and on their feeding practices using the Comprehensive Feeding Practices Questionnaire. The results showed that mothers’ supportive emotion responses (e.g., problem-focused, emotion-focused, and expressive encouragement reactions) tend to be positively associated with responsive feeding practices (e.g., encouraging, modelling, and teaching healthy food-related behaviors). Instead, mothers’ unsupportive responses (e.g., distress, punitive and minimization reactions) tend to be positively associated with nonresponsive feeding practices (e.g., food as reward or to regulate emotions, and pressure to eat) and negatively associated with responsive feeding practices. Our results suggest that emotional and feeding responsiveness may be intertwined and that differences in parent’s emotional responsiveness may translate into differences in their feeding styles, setting the stage for parents’ use of positive vs. negative feeding practices. 相似文献
74.
75.
Neves Lia Mara Grosso Tim Carla Roberta Floriano Elaine Medeiros da Silva de Avó Lucimar Retto Fernandes João Batista Parizotto Nivaldo Antonio Cominetti Marcia Regina 《Lasers in medical science》2021,36(4):863-870
Lasers in Medical Science - Ultraviolet radiation (UVR) is the major etiologic agent of cutaneous photoaging, and different strategies are used to prevent and treat this condition. The... 相似文献
76.
Barroso Rosmeire Aparecida Navarro Ricardo Tim Carla Roberta de Paula Ramos Lucas de Oliveira Luciane Dias Araki Ângela Toshie Fernandes Karina Gonzales Camara Macedo Daniela Assis Lívia 《Lasers in medical science》2021,36(6):1235-1240
Lasers in Medical Science - Acne vulgaris is the most recurring skin condition in the world, causing great harm to the physical and psychological well-being of many patients. Antimicrobial... 相似文献
77.
Amadio Eliane Martins Marcos Rodrigo Labat Serra Andrey Jorge dos Santos Solange Almeida Caires Jheniphe Rocha Fernandes Guilherme Henrique Cardosos Leal-Junior Ernesto Cesar Ferrari João Carlos Correa de Tarso Camillo de Carvalho Paulo 《Lasers in medical science》2021,36(7):1427-1435
Lasers in Medical Science - Photobiomodulation therapy (PBMT) has been indicated for enforcement on healing skin wounds. This study evaluated the effects of PBMT on the healing of skin wounds... 相似文献
78.
Chimello-Sousa Daniela Thomazatti Lavez Geovane Praxedes Fernandes Roger Rodrigo Tavares Milla Sprone Rosa Adalberto Luiz Siessere Selma Regalo Simone Cecílio Hallak Bombonato-Prado Karina Fittipaldi 《Lasers in medical science》2021,36(9):1979-1988
Lasers in Medical Science - The purpose of this study is to analyze the influence of InGaAlP diode laser (660 nm) with or without an odontogenic medium (OM) in the functional activity of... 相似文献
79.
Daniela de Queiroz Moura Ramon Rawache Marília Ferreira Gomes Garcia Nathalia Farias Vasconcelos Priscila Santos Gustavo Rego Coelho Thiago Luis da Paz Santos Duílio Reis da Rocha Filho Sonia Leite da Silva Eliana Regia Barbosa de Almeida Paula F.C.B.C. Fernandes João Batista Cerqueira José Huygens Parente Garcia Claudia Maria Costa de Oliveira 《Transplantation proceedings》2021,53(4):1345-1349
Transplantation of any organ has some inherent risk of disease transmission, such as infection and malignancy. The present study aims to describe 2 cases of choriocarcinoma transmission after kidney and liver transplantation originating from the same patient. The donor was a 17-year-old woman who died of cerebral hemorrhage. Both organ recipients died of metastatic choriocarcinoma few months after the transplantation, within days after starting chemotherapy. Retrospective hCG (human chorionic gonadotropin hormone) analysis in donor's blood stored at the time of donation had a result of 9324 mIU/mL. Despite its rarity, clinicians should be aware of the risk of transplant-related choriocarcinoma from female donors in childbearing age. In some cases, hCG dosage should be performed before donation. 相似文献