全文获取类型
收费全文 | 235524篇 |
免费 | 14921篇 |
国内免费 | 990篇 |
专业分类
耳鼻咽喉 | 2527篇 |
儿科学 | 6001篇 |
妇产科学 | 4424篇 |
基础医学 | 29383篇 |
口腔科学 | 4339篇 |
临床医学 | 24105篇 |
内科学 | 49658篇 |
皮肤病学 | 3225篇 |
神经病学 | 23677篇 |
特种医学 | 10116篇 |
外国民族医学 | 13篇 |
外科学 | 37069篇 |
综合类 | 2547篇 |
现状与发展 | 1篇 |
一般理论 | 177篇 |
预防医学 | 16530篇 |
眼科学 | 5553篇 |
药学 | 15503篇 |
1篇 | |
中国医学 | 319篇 |
肿瘤学 | 16267篇 |
出版年
2023年 | 1337篇 |
2022年 | 2191篇 |
2021年 | 5344篇 |
2020年 | 3047篇 |
2019年 | 5067篇 |
2018年 | 6053篇 |
2017年 | 4446篇 |
2016年 | 4860篇 |
2015年 | 5743篇 |
2014年 | 8356篇 |
2013年 | 11263篇 |
2012年 | 17288篇 |
2011年 | 18028篇 |
2010年 | 10077篇 |
2009年 | 9320篇 |
2008年 | 15879篇 |
2007年 | 16671篇 |
2006年 | 16211篇 |
2005年 | 16069篇 |
2004年 | 15120篇 |
2003年 | 13798篇 |
2002年 | 13198篇 |
2001年 | 1945篇 |
2000年 | 1445篇 |
1999年 | 2019篇 |
1998年 | 2789篇 |
1997年 | 2222篇 |
1996年 | 1928篇 |
1995年 | 1771篇 |
1994年 | 1529篇 |
1993年 | 1499篇 |
1992年 | 994篇 |
1991年 | 931篇 |
1990年 | 792篇 |
1989年 | 751篇 |
1988年 | 680篇 |
1987年 | 628篇 |
1986年 | 638篇 |
1985年 | 682篇 |
1984年 | 912篇 |
1983年 | 786篇 |
1982年 | 1033篇 |
1981年 | 967篇 |
1980年 | 837篇 |
1979年 | 467篇 |
1978年 | 514篇 |
1977年 | 447篇 |
1976年 | 420篇 |
1975年 | 315篇 |
1974年 | 311篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
Heidi Ulrich Michael Landthaler Thomas Vogt 《Journal der Deutschen Dermatologischen Gesellschaft》2007,5(6):493-495
The induction of a granulomatous inflammation by jellyfish toxins is rare. More typically, acute toxic and urticarial reactions are seen. An 11-year-old boy developed a striated urticarial erythema on the left cheek after contact with a gelatinous mass while swimming in the sea in Croatia. After initial erosion, a striated induration developed in the area of contact. Histological examination revealed a granulomatous inflammation with some eosinophils. While topical steroid-based antiinflammatory and antibacterial therapy over several weeks was not effective, topical therapy with tacrolimus 0.1% for two two-week treatment periods led to healing of the skin changes with a slight scar. There was no clinical recurrence after 5 month of follow-up. 相似文献
62.
63.
64.
65.
Philip E Benson C W Ian Douglas Michael V Martin 《American journal of orthodontics and dentofacial orthopedics》2004,126(3):325-330
The objective of this study was to investigate the effect of fluoridated elastomeric ligatures on the microbiology of local dental plaque in vivo. This randomized, prospective, longitudinal, clinical trial had a split-mouth crossover design. The subjects were 30 patients at the beginning of their treatment with fixed orthodontic appliances in the orthodontic departments of the Liverpool and the Sheffield dental hospitals in the United Kingdom. The study consisted of 2 experimental periods of 6 weeks with a washout period between. Fluoridated elastomers were randomly allocated at the first visit to be placed around brackets on tooth numbers 12, 11, 33 or 22, 21, 43. Nonfluoridated elastomers were placed on the contralateral teeth. Standard nonantibacterial fluoridated toothpaste and mouthwash were supplied. After 6 weeks (visit 2), the elastomers were removed, placed in transport media, and plated on agar within 2 hours. Nonfluoridated elastomers were placed on all brackets for 1 visit to allow for a washout period. At visit 3, fluoridated elastomers were placed on the teeth contralateral to those that received them at visit 1. At visit 4, the procedures at visit 2 were repeated. Samples were collected on visits 2 and 4. A logistic regression was performed, with the presence or absence of streptococcal or anaerobic growth as the dependent variable. A mixed-effects analysis of variance was carried out with the percentage of streptococcal or anaerobic bacterial count as the dependent variable. The only significant independent variables were the subject variable (P =<.001) for the percentage of streptococcal and anaerobic bacterial count and the visit variable for the percentage of streptococcal count (P =<.001). The use of fluoridated or nonfluoridated elastomers was not significant for percentage of either streptococcal (P =.288) or anaerobic count (P =.230). Fluoridated elastomers are not effective at reducing local streptococcal or anaerobic bacterial growth after a clinically relevant time in the mouth. 相似文献
66.
Wendy Packman Joselyn Fine Beth Chesterman Kelly vanZutphen Rama Golan Michael Amylon 《Children's Health Care》2004,33(3):201-215
This research was conducted at a summer camp for siblings of children with cancer. The camp is designed to address emotional problems, provide peer interaction and validation, and bolster siblings' self-esteem. Standardized measures assessing posttraumatic stress, anxiety, quality of life, and self-esteem were administered to 77 siblings (ages 6-17) prior to attending camp and again 3 months after camp. From pre- to post-camp, the siblings reported statistically significant decreases in symptoms of posttraumatic stress and anxiety, and statistically significant improvements in quality of life and self-esteem. These preliminary findings are encouraging and suggest the value of camp as a psychological intervention and provide a model for other pediatric cancer facilities designing intervention programs for siblings. 相似文献
67.
68.
69.
70.
Michael T Fitch David E Manthey Henderson D McGinnis Bret A Nicks Manoj Pariyadath 《BMC medical education》2008,8(1):38