首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   293639篇
  免费   22524篇
  国内免费   1170篇
耳鼻咽喉   3397篇
儿科学   7665篇
妇产科学   5822篇
基础医学   39422篇
口腔科学   5556篇
临床医学   30968篇
内科学   61235篇
皮肤病学   3947篇
神经病学   27601篇
特种医学   9764篇
外国民族医学   12篇
外科学   43999篇
综合类   4336篇
一般理论   341篇
预防医学   25813篇
眼科学   7203篇
药学   20317篇
  6篇
中国医学   418篇
肿瘤学   19511篇
  2023年   1489篇
  2022年   2664篇
  2021年   5961篇
  2020年   3622篇
  2019年   5915篇
  2018年   6659篇
  2017年   4975篇
  2016年   5593篇
  2015年   6474篇
  2014年   9508篇
  2013年   13220篇
  2012年   19816篇
  2011年   20779篇
  2010年   11626篇
  2009年   10386篇
  2008年   18269篇
  2007年   19160篇
  2006年   18981篇
  2005年   18937篇
  2004年   17763篇
  2003年   16610篇
  2002年   15685篇
  2001年   3639篇
  2000年   3172篇
  1999年   3667篇
  1998年   3633篇
  1997年   3040篇
  1996年   2595篇
  1995年   2531篇
  1994年   2162篇
  1993年   1957篇
  1992年   2364篇
  1991年   2196篇
  1990年   2020篇
  1989年   1908篇
  1988年   1831篇
  1987年   1834篇
  1986年   1805篇
  1985年   1840篇
  1984年   1909篇
  1983年   1716篇
  1982年   1777篇
  1981年   1649篇
  1980年   1500篇
  1979年   1276篇
  1978年   1180篇
  1977年   990篇
  1976年   947篇
  1975年   748篇
  1974年   847篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
In this review, we critically evaluate the evidence for local IgE production in allergic rhinitis mucosa and the concept of local allergy in non-atopic idiopathic rhinitis. Significantly, fewer studies have focused on the disease pathways associated with non-allergic rhinitis compared with their allergic counterparts. Recently, there's been a revival of the hypothesis concerning the existence of local tissue-specific allergic disease confined to the nasal mucosa of some systemically non-atopic rhinitis subjects. Providing the evidence for local mucosal IgE production in allergic rhinitis is a pre-requisite to reviewing its existence in non-allergic rhinitis. In addition, practical and theoretical approaches useful in the detection of allergy in non-allergic rhinitis will be discussed. Furthermore, successful therapeutic regimens used in the treatment of non-allergic rhinitis will be examined as these could provide an insight into the underlying pathophysiology of this common but poorly understood disease.  相似文献   
92.
93.
94.
Dental management of patients with autoimmune vesiculobullous disorders is complicated because of prominent involvement of oral mucosa, increased risk of oral disease, and difficulty in rendering dental care. Although these diseases are relatively uncommon, dental practitioners should be familiar with the oral sequelae of these conditions and their management. Pemphigus vulgaris, cicatricial pemphigoid, and epidermolysis bullosa represent the most common autoimmune oral vesiculobullous diseases. This case-illustrated review summarizes the pathogenesis, diagnostic features, and natural history of oral vesiculobullous disorders, placing an emphasis on the treatment and prevention of associated oral disease aimed at maintaining a healthy, functional dentition.  相似文献   
95.
96.
97.
Abstract   We evaluated the associations between glycemic therapies and prevalence of diabetic peripheral neuropathy (DPN) at baseline among participants in the Bypass Angioplasty Revascularization Investigation 2 Diabetes (BARI 2D) trial on medical and revascularization therapies for coronary artery disease (CAD) and on insulin-sensitizing vs. insulin-providing treatments for diabetes. A total of 2,368 patients with type 2 diabetes and CAD was evaluated. DPN was defined as clinical examination score >2 using the Michigan Neuropathy Screening Instrument (MNSI). DPN odds ratios across different groups of glycemic therapy were evaluated by multiple logistic regression adjusted for multiple covariates including age, sex, hemoglobin A1c (HbA1c), and diabetes duration. Fifty-one percent of BARI 2D subjects with valid baseline characteristics and MNSI scores had DPN. After adjusting for all variables, use of insulin was significantly associated with DPN (OR = 1.57, 95% CI: 1.15–2.13). Patients on sulfonylurea (SU) or combination of SU/metformin (Met)/thiazolidinediones (TZD) had marginally higher rates of DPN than the Met/TZD group. This cross-sectional study in a cohort of patients with type 2 diabetes and CAD showed association of insulin use with higher DPN prevalence, independent of disease duration, glycemic control, and other characteristics. The causality between a glycemic control strategy and DPN cannot be evaluated in this cross-sectional study, but continued assessment of DPN and randomized therapies in BARI 2D trial may provide further explanations on the development of DPN.  相似文献   
98.
99.
Originally described by Rosen in 1983, syringomatous nipple adenoma (SAN) is a tumor of disputed histogenesis, which can be problematic both diagnostically and therapeutically. 1 It is a benign primary tumor of breast epithelium with histology similar to that of the syringoma. In the current case, we describe a 40-year-old female with this lesion occurring within a supernumerary breast. This case represents, to our knowledge, the first such reported case, and represents a significant finding as its presence could lend some confusion as to whether or not this represents a benign primary process of breast or a potentially infiltrative tumor of the skin.  相似文献   
100.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号