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   23119篇
  免费   1897篇
  国内免费   73篇
耳鼻咽喉   232篇
儿科学   736篇
妇产科学   661篇
基础医学   3502篇
口腔科学   484篇
临床医学   2560篇
内科学   4512篇
皮肤病学   652篇
神经病学   2295篇
特种医学   564篇
外国民族医学   1篇
外科学   2572篇
综合类   139篇
一般理论   39篇
预防医学   2278篇
眼科学   368篇
药学   1641篇
中国医学   42篇
肿瘤学   1811篇
  2023年   171篇
  2022年   432篇
  2021年   779篇
  2020年   430篇
  2019年   732篇
  2018年   820篇
  2017年   562篇
  2016年   688篇
  2015年   677篇
  2014年   904篇
  2013年   1183篇
  2012年   1634篇
  2011年   1695篇
  2010年   965篇
  2009年   775篇
  2008年   1296篇
  2007年   1334篇
  2006年   1340篇
  2005年   1227篇
  2004年   1083篇
  2003年   940篇
  2002年   924篇
  2001年   399篇
  2000年   378篇
  1999年   330篇
  1998年   201篇
  1997年   174篇
  1996年   151篇
  1995年   152篇
  1994年   141篇
  1993年   99篇
  1992年   252篇
  1991年   226篇
  1990年   196篇
  1989年   203篇
  1988年   183篇
  1987年   132篇
  1986年   132篇
  1985年   137篇
  1984年   124篇
  1983年   88篇
  1982年   70篇
  1981年   66篇
  1980年   63篇
  1979年   77篇
  1978年   51篇
  1977年   51篇
  1976年   45篇
  1974年   56篇
  1973年   45篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Hailey–Hailey disease (HHD), also known as benign familial pemphigus, is an autosomal dominant skin condition that affects the adhesion of epidermal keratinocytes. Although the initial manifestation of flaccid vesicles on erythematous or normal skin in flexure sites frequently goes unnoticed, large, macerated, exudative plaques of superficial erosions with crusting are observed at the time of diagnosis. There is no specific treatment for HHD, and most cases are symptomatically supported. However, infrared laser ablation has been somewhat helpful. We present a case successfully treated with fractional CO2 laser showing a long-term favourable outcome and no adverse effects. Thus, this modality could be an alternative to full ablation for this condition.  相似文献   
2.
3.
4.
5.
6.
Background and aimsDespite using sensor-augmented pump therapy (SAPT) with predictive low-glucose management (PLGM), hypoglycemia is still an issue in patients with type 1 Diabetes (T1D). Our aim was to determine factors associated with clinically significant hypoglycemia (<54 mg/dl) in persons with T1D treated with PLGM-SAPT.Methodology: This is a multicentric prospective real-life study performed in Colombia, Chile and Spain. Patients with T1D treated with PLGM-SAPT, using sensor ≥70% of time, were included. Data regarding pump and sensor use patterns and carbohydrate intake from 28 consecutive days were collected. A bivariate and multivariate Poisson regression analysis was carried out, to evaluate the association between the number of events of <54 mg/dl with the clinical variables and patterns of sensor and pump use.Results188 subjects were included (41 ± 13.8 years-old, 23 ± 12 years disease duration, A1c 7.2% ± 0.9). The median of events <54 mg/dl was four events/patient/month (IQR 1–10), 77% of these events occurred during day time. Multivariate analysis showed that the number of events of hypoglycemia were higher in patients with previous severe hypoglycemia (IRR1.38; 95% CI 1.19–1.61; p < 0.001), high glycemic variability defined as Coefficient of Variation (CV%) > 36% (IRR 2.09; 95%CI 1.79–2.45; p < 0.001) and hypoglycemia unawareness. A protector effect was identified for adequate sensor calibration (IRR 0.77; 95%CI 0.66–0.90; p:0.001), and the use of bolus wizard >60% (IRR 0.74; 95%CI 0.58–0.95; p:0.017).ConclusionIn spite of using advanced SAPT, clinically significant hypoglycemia is still a non-negligible risk. Only the identification and intervention of modifiable factors could help to prevent and reduce hypoglycemia in clinical practice.  相似文献   
7.
This study was designed to characterize a collection of 60 enteropathogenic Escherichia coli (EPEC) isolates from diarrheic feces of patients in the Ribeirão Preto metropolitan area regarding different phenotypic and molecular features. We examined antibiotic resistance profiles, occurrence of virulence factors‐encoding genes, intimin subtypes and the correlation of serotypes among typical (tEPEC) and atypical (aEPEC) EPEC isolates. The results demonstrated that atypical EPEC was more heterogeneous than typical EPEC concerning the characteristics investigated and 45.2% do not belong to classical EPEC serogroups. Intimin subtype β was the most frequent among the EPEC isolates (46.7%), being detected in both tEPEC and aEPEC. The majority of aEPEC isolates presented localized adherence‐like (LAL) pattern to HEp‐2 cells, although aEPEC isolates displaying diffuse adherence (DA) or non‐adherent were also detected. High prevalence of antimicrobial resistance was found for ampicillin, cephalothin, sulfonamide and tetracycline. In general, tEPEC isolates were more resistant to the antimicrobials tested than aEPEC isolates.  相似文献   
8.
9.
10.
International Journal of Legal Medicine - Sex identification is a primary step in forensic analysis of skeletal remains. The accuracy of sex estimation methods greatly depends on the sexual...  相似文献   
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