全文获取类型
收费全文 | 1451063篇 |
免费 | 124748篇 |
国内免费 | 14280篇 |
专业分类
耳鼻咽喉 | 17678篇 |
儿科学 | 44454篇 |
妇产科学 | 38743篇 |
基础医学 | 197106篇 |
口腔科学 | 38223篇 |
临床医学 | 135784篇 |
内科学 | 295618篇 |
皮肤病学 | 33205篇 |
神经病学 | 116726篇 |
特种医学 | 59601篇 |
外国民族医学 | 344篇 |
外科学 | 222177篇 |
综合类 | 50057篇 |
现状与发展 | 26篇 |
一般理论 | 417篇 |
预防医学 | 113464篇 |
眼科学 | 31494篇 |
药学 | 105819篇 |
116篇 | |
中国医学 | 8214篇 |
肿瘤学 | 80825篇 |
出版年
2021年 | 14288篇 |
2019年 | 12996篇 |
2018年 | 17383篇 |
2017年 | 14195篇 |
2016年 | 16129篇 |
2015年 | 19344篇 |
2014年 | 26272篇 |
2013年 | 35574篇 |
2012年 | 44813篇 |
2011年 | 48308篇 |
2010年 | 30160篇 |
2009年 | 28461篇 |
2008年 | 42598篇 |
2007年 | 45021篇 |
2006年 | 46173篇 |
2005年 | 44760篇 |
2004年 | 40997篇 |
2003年 | 39891篇 |
2002年 | 37241篇 |
2001年 | 68834篇 |
2000年 | 70800篇 |
1999年 | 59700篇 |
1998年 | 18854篇 |
1997年 | 17104篇 |
1996年 | 17536篇 |
1995年 | 17639篇 |
1994年 | 16313篇 |
1993年 | 14939篇 |
1992年 | 48112篇 |
1991年 | 46658篇 |
1990年 | 44736篇 |
1989年 | 42487篇 |
1988年 | 39331篇 |
1987年 | 38603篇 |
1986年 | 36243篇 |
1985年 | 34989篇 |
1984年 | 26532篇 |
1983年 | 22212篇 |
1982年 | 13910篇 |
1981年 | 12506篇 |
1979年 | 23601篇 |
1978年 | 17069篇 |
1977年 | 14369篇 |
1976年 | 13177篇 |
1975年 | 13735篇 |
1974年 | 16118篇 |
1973年 | 15409篇 |
1972年 | 14186篇 |
1971年 | 13042篇 |
1970年 | 11874篇 |
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
81.
82.
Yaqian Li Jingjing Yu Yun Kuang Chengkun Wu Liu Yang Qiulian Fang 《Current medical research and opinion》2020,36(9):1433-1439
Abstract
Objective
The sex, age, medical history, treatment, tobacco use, race risk (SAMe-TT2R2) Score; the sex, age, medical history, treatment, tobacco use, genotype combination (SAMe-TT2G2) Score; and the so-called modified SAMe-TT2R2 scores have been proposed to predict the anticoagulation quality for patients with non-valvular atrial fibrillation (NVAF). The data from a prospective controlled study is used to validate the SAMe-TT2R2 and SAMe-TT2G2 scores in Chinese NVAF patients treated with warfarin and to evaluate the association of factors with time in therapeutic range (TTR) to predict the quality of oral anticoagulation control. 相似文献83.
Recurrent Oral and Genital Ulcers in an Infant: Neonatal Presentation of Pediatric Behçet Disease 下载免费PDF全文
Emma F. Johnson M.D. Danielle M. Hawkins M.D. Laura K. Gifford M.D. Aimee C. Smidt M.D. 《Pediatric dermatology》2015,32(5):714-717
Behçet disease is a complex, multisystem disease characterized by recurrent oral and genital ulcerations. It rarely occurs in infants or children. Neonatal Behçet disease has been reported in infants whose ulcers resolve at or before 9 weeks of age. Few cases of neonatal Behçet disease persisting into childhood have previously been reported. We report the case of a 1‐month‐old infant who presented with severe recurrent genital ulcerations and at 6 months developed recurrent oral ulcerations. Her orogenital ulcerations continue to recur. Human leukocyte antigen testing revealed HLA‐B51 and B44 positivity. This is a case of pediatric Behçet disease in the neonatal period. Behçet disease should be considered in the differential diagnosis of recurrent genital and oral ulcerations in infants and children. 相似文献
84.
D. Baker G. Pryce L. K. James K. Schmierer G. Giovannoni 《European journal of neurology》2020,27(2):221-228
Clinical trials are probably the most informative experiments to help an understanding of multiple sclerosis (MS) biology. Recent successes with CD20‐depleting antibodies have focused attention towards B cell subsets as important mediators in MS. The trial of tabalumab (NTC00882999), which inhibits B cell activation factor (BAFF), is reported and reviewed and this trial is contrasted with the trial on the inhibition of a proliferation‐inducing ligand (APRIL) and BAFF using atacicept (NCT00642902). Both tabalumab and atacicept induce depletion of mature B cells and inhibit antibody formation, but they fail to deplete memory B cells and do not inhibit relapsing MS. Atacicept is reported to augment memory B cell responses and may precipitate relapse, suggesting the importance of APRIL. However, BAFF inhibition can enhance peripheral blood memory B cell responses, which was not associated with augmented relapse. Although other interpretations are possible, these data further support the hypothesis that memory B cells may be of central importance in relapsing MS, as they are the major CD20+ B cell subset expressing APRIL receptors. They also suggest that quantitative and/or qualitative differences in B cell responses or other factors, such as an immune‐regulatory effect associated with APRIL, may be important in determining whether MS reactivates following neutralization of peripheral B cell maturation and survival factors. 相似文献
85.
86.
87.
88.
89.
90.