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   823篇
  免费   61篇
  国内免费   2篇
耳鼻咽喉   3篇
儿科学   11篇
妇产科学   11篇
基础医学   121篇
口腔科学   18篇
临床医学   66篇
内科学   205篇
皮肤病学   28篇
神经病学   44篇
特种医学   14篇
外科学   120篇
综合类   16篇
一般理论   3篇
预防医学   76篇
眼科学   30篇
药学   61篇
中国医学   2篇
肿瘤学   57篇
  2024年   2篇
  2023年   10篇
  2022年   27篇
  2021年   43篇
  2020年   31篇
  2019年   18篇
  2018年   33篇
  2017年   22篇
  2016年   26篇
  2015年   21篇
  2014年   26篇
  2013年   39篇
  2012年   73篇
  2011年   64篇
  2010年   42篇
  2009年   30篇
  2008年   44篇
  2007年   38篇
  2006年   44篇
  2005年   34篇
  2004年   35篇
  2003年   35篇
  2002年   35篇
  2001年   21篇
  2000年   11篇
  1999年   16篇
  1998年   1篇
  1997年   6篇
  1996年   6篇
  1995年   3篇
  1994年   5篇
  1993年   5篇
  1992年   5篇
  1991年   6篇
  1990年   6篇
  1989年   7篇
  1988年   3篇
  1987年   2篇
  1986年   3篇
  1985年   1篇
  1983年   3篇
  1978年   1篇
  1972年   2篇
  1968年   1篇
排序方式: 共有886条查询结果,搜索用时 31 毫秒
871.
872.
873.
Wu S  Gao J  Dinh QT  Chen C  Fimmel S 《Molecular immunology》2008,45(8):2288-2296
Identification of individual response-signal pathway induced by UVA-irradiation is necessary for understanding photo-biological and -pathological mechanisms with respect to the prevention of UV-irradiated skin damage and aging. Here, we investigated the role of D-alpha-tocopherol in the regulation of IL-8 production and AP-1 binding activity in UVA-irradiated human keratinocytes. UVA dramatically upregulated IL-8 mRNA expression and protein secretion and enhanced the AP-1-DNA binding activity. These effects of UVA irradiation were effectively reduced by D-alpha-tocopherol in a dose-dependent manner. The human keratinocytes expressed various NAD(P)H oxidase components, gp91phox homologues Nox1, and p22phox, p47phox, p67phox, as well as NOXO1, suggesting that cellular stress induced by UVA included the activation of non-phagocytic NADPH oxidase system, leading to AP-1 transactivation and IL-8 expression. D-alpha-tocopherol significantly inhibited the NADPH oxidase activity and the formation of malondialdehyde-thiobarbituric acid under UVA exposure. These results demonstrated that D-alpha-tocopherol may be able to prevent the IL-8 upregulation and the increase in AP-1 activation induced by UVA irradiation through down-modulating cellular oxidative stress.  相似文献   
874.
875.
876.
A cardiac cavernous hemangioma is a rare, primary, benign tumor that is usually diagnosed in young or middle-aged patients. In this article, we report the case of a 71-year-old male patient whose doctors incidentally discovered a heart tumor on his transthoracic echocardiography. Triple-phase computed tomography (CT) (pre-contrast, arterial and portal venous) missed the lesion, and magnetic resonance imaging (MRI) revealed a small, oval tumor attached to the wall of the right ventricle. The tumor was successfully removed surgically, and the patient recovered after 2 weeks. A histopathological examination resulted in the diagnosis of a benign cavernous hemangioma.  相似文献   
877.
A ruptured blister-like aneurysm of the internal carotid artery is a rare event with a high risk of recurrence and mortality. Selecting an appropriate treatment modality remains challenging due to a lack of consensus or specific recommendations in the literature. In this article, we present the case of a 68-year-old man who presented with ruptured blister-like aneurysms in the supraclinoid portion of the internal carotid artery. The patient was diagnosed and successfully managed using an endovascular coil embolization technique at our hospital. We aim to illustrate and share our experiences with this rare occurrence, which may assist in the treatment of similar cases in the future.  相似文献   
878.
Though anthropometric measurement (AM) frequently occurs in school settings, it is not without risks to child wellbeing. The aim of this scoping review was to examine how AM in school settings takes place and is reported on to make recommendations on best practices. We identified and extracted data from 440 studies published since 2005 that conducted AM in school (pre-school through secondary/high school) settings. Privacy and sensitivity of AM were unclear in over 90% of studies. Thirty-one studies (7.0%) reported protecting student privacy, while nine (2.0%) reported public measurement. Only five studies reported sensitivity regarding AM (1.1%). Exactly who conducted AM was not specified in 201 studies (45.7%). Sixty-nine studies did not provide a weight status criteria citation (19.2%), and 10 used an incorrect citation (2.7%). In summary, serious shortcomings in the reporting of how AM is conducted and by whom, along with details concerning weight status classification, are evident. There is considerable room for improvement regarding the reporting of key methodological details. We propose best practices for AM in school settings, which also double as conditions that should be met before AM takes place in school settings.  相似文献   
879.
880.

Introduction

Young adults with perinatally acquired HIV (YA-PHIV) are facing transitions to adult life. This study assessed health risk behaviours (including substance use), mental health, quality of life (QOL) and HIV treatment outcomes of Thai YA-PHIV.

Methods

A cross-sectional study was conducted in Thai YA-PHIV aged 18–25 years who were enrolled in a prospective cohort study at five tertiary paediatric HIV care centres in Thailand. Study data were obtained through face-to-face interviews from November 2020 to July 2021. Assessments were performed for alcohol use (Alcohol Use Disorders Identification Test; AUDIT), smoking (Fagerstrom Test for Nicotine Dependence), drug/substance use (Drug Abuse Screening Test; DAST-10), depression (Patient Health Questionnaire for Adolescents; PHQ-A), anxiety (Generalized Anxiety Disorder; GAD-7) and QOL (World Health Organization QOL Brief-Thai). HIV treatment outcomes were extracted from the National AIDS Program database.

Results

Of 355 YA-PHIV, 163 (46%) were males: their median age was 21.7 (interquartile range, IQR 20.2–23.5) years. There were 203 YA-PHIV (58%) who reported ever having sex; 141 (40%) were sexually active in the past 6 months, of whom 86 (61%) reported 100% condom use. Overall, 49 (14%) met the criteria for harmful alcohol use; 28 (7.9%) were alcohol dependent. Sixty (17%) were current smokers and 37 (11%) used drugs/substances. The frequency of moderate up to severe symptoms for depression was 18% and for anxiety was 9.7%. Their overall QOL was good in 180 (51%), moderate in 168 (47%) and poor in five (1.4%). There were 49 YA-PHIV (14%) with CD4 <200 cells/mm3 and 85 (24%) with virologic non-suppression (HIV-RNA >200 copies/ml). On multivariate analyses, the highest education at the primary to high school or vocational school levels (adjusted odds ratio [aOR] 2.02, 95% CI 1.40–3.95, p 0.04), harmful alcohol use (aOR 2.48, 95% CI 1.24–4.99, p 0.01), alcohol dependence (aOR 3.54, 95% CI 1.51–8.31, p <0.01) and lifetime suicidal attempt (aOR 2.66, 95% CI 1.11–6.35, p 0.03) were associated with non-suppression.

Conclusions

Regular screening for alcohol use and mental health, including suicidality, would be useful to identify YA-PHIV who need more intensive psychosocial support or referral services to ensure they can achieve and maintain a high QOL into adult life.  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