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   2670篇
  免费   150篇
  国内免费   8篇
耳鼻咽喉   21篇
儿科学   235篇
妇产科学   53篇
基础医学   268篇
口腔科学   64篇
临床医学   182篇
内科学   527篇
皮肤病学   118篇
神经病学   117篇
特种医学   84篇
外科学   381篇
综合类   62篇
预防医学   132篇
眼科学   168篇
药学   262篇
中国医学   11篇
肿瘤学   143篇
  2023年   19篇
  2022年   30篇
  2021年   97篇
  2020年   55篇
  2019年   65篇
  2018年   81篇
  2017年   86篇
  2016年   95篇
  2015年   83篇
  2014年   132篇
  2013年   159篇
  2012年   196篇
  2011年   186篇
  2010年   108篇
  2009年   90篇
  2008年   149篇
  2007年   127篇
  2006年   122篇
  2005年   104篇
  2004年   92篇
  2003年   63篇
  2002年   51篇
  2001年   47篇
  2000年   48篇
  1999年   38篇
  1998年   21篇
  1997年   23篇
  1996年   10篇
  1995年   17篇
  1993年   16篇
  1992年   41篇
  1991年   24篇
  1990年   34篇
  1989年   33篇
  1988年   34篇
  1987年   26篇
  1986年   20篇
  1985年   28篇
  1984年   21篇
  1983年   10篇
  1980年   8篇
  1979年   21篇
  1978年   13篇
  1977年   7篇
  1975年   8篇
  1974年   13篇
  1973年   14篇
  1972年   8篇
  1971年   8篇
  1965年   7篇
排序方式: 共有2828条查询结果,搜索用时 15 毫秒
41.
IntroductionHigh-sensitivity C-reactive protein (hs-CRP), a marker of inflammation, is known to be elevated in patients with erectile dysfunction (ED). However, its role in predicting therapeutic response to phosphodiesterase-5 inhibitors is incompletely understood.AimThe aim of this study was to understand the relationship among hs-CRP, mechanism of ED, and therapeutic response of ED to tadalafil, a phosphodiesterase-5 inhibitor.MethodsA total of 282 men (mean age 36.6 ± 12.0 years) with ED were included. All subjects underwent detailed evaluation, including estimation of a 6-item abbreviated version of the International Index of Erectile Function (IIEF-6) score, penile Doppler studies, and measurement of hs-CRP. IIEF-6 scoring and hs-CRP measurement were repeated after 6 weeks of tadalafil therapy (10 mg/day). The patients were categorized into vasculogenic and nonvasculogenic ED groups based on penile Doppler findings.Main Outcome MeasureThe main outcome measure was the therapeutic response to tadalafil, in relation to the mechanism of ED and hs-CRP levels.ResultsVasculogenic ED was much less common (23.8% of the subjects) than non-vasculogenic ED. Subjects with vasculogenic ED were older, had higher prevalence of cardiovascular risk factors, had more severe (mean IIEF-6 score 9.2 ± 4.6 vs 14.8 ± 4.7; P < .001) and longer duration ED, and responded less favorably to therapy (response rate 10.4% vs 75.0%; P < .001). Those showing improvement with tadalafil had lower hs-CRP at baseline (median 1.5 mg/L [interquartile range 0.9?2.3] vs 2.0 mg/L [interquartile range 1.1?3.1; P = .034]) and had proportionately greater reduction in its level. However, on multivariate analysis, only shorter duration of ED (P = .008), non-vasculogenic origin (P = .025), and higher IIEF-6 score at baseline (P = .013) were independent predictors of response to treatment.Clinical ImplicationsSerum hs-CRP is elevated in patients who are less likely to respond to vasodilator therapy but does not have an independent predictive value for this purpose.Strengths & LimitationsThis is the largest study to evaluate the relationship among the mechanism of ED, serum hs-CRP level, and therapeutic response of ED to tadalafil. All patients underwent a penile Doppler study to characterize the type of ED. The limitations were nonrandomized nature of the study and nearly 22% dropout rate.ConclusionSerum hs-CRP level is higher in vasculogenic ED compared with non-vasculogenic ED, and is associated with poorer response to tadalafil therapy. However, this association is not independent of underlying risk factors and mechanism of ED.Jamaluddin, Bansal M, Srivastava GK, et al. Role of Serum High-Sensitivity C-Reactive Protein as a Predictor of Therapeutic Response to Tadalafil in Patients With Erectile Dysfunction: A Prospective Observational Study. J Sex Med 2019;16:1912–1921.  相似文献   
42.
43.
44.
Chronic paronychia is an inflammatory disorder of the nail folds of a toe or finger presenting as redness, tenderness, and swelling. It is recalcitrant dermatoses seen commonly in housewives and housemaids. It is a multifactorial inflammatory reaction of the proximal nail fold to irritants and allergens. Repeated bouts of inflammation lead to fibrosis of proximal nail fold with poor generation of cuticle, which in turn exposes the nail further to irritants and allergens. Thus, general preventive measures form cornerstone of the therapy. Though previously anti-fungals were the mainstay of therapy, topical steroid creams have been found to be more effective in the treatment of chronic paronychia. In recalcitrant cases, surgical treatment may be resorted to, which includes en bloc excision of the proximal nail fold or an eponychial marsupialization, with or without nail plate removal. Newer therapies and surgical modalities are being employed in the management of chronic paronychia. In this overview, we review recent epidemiological studies, present current thinking on the pathophysiology leading to chronic paronychia, discuss the challenges chronic paronychia presents, and recommend a commonsense approach to management.  相似文献   
45.
46.
47.
48.
Neurosarcoidosis is seen in 5–15% of patients with systemic sarcoidosis. The most common cranial nerve presentations are optic neuropathy and facial nerve palsy. The authors present a case of sarcoidosis presenting with a pupil-involving third nerve palsy. The patient responded to corticosteroid therapy with resolution of investigations her cranial nerve palsy but progressed to develop cerebellar signs. This is the first documented case of a pupil-involving third nerve palsy occurring as the first presentation of neurosarcoidosis. Although typically a pupil-involving third nerve palsy necessitates urgent neuroimaging to rule out a posterior communicating artery aneurysm, it is important to recognise inflammatory causes in the differential diagnosis.  相似文献   
49.
50.

Background

Fine-needle aspiration (FNA) of adrenals is needed in patients with pyrexia of unknown origin (PUO) and adrenal enlargement in absence of other diagnostic clues. Adrenals are easily accessible by endoscopic ultrasound (EUS) due to proximity; however, there is no systemic study available on FNA of adrenals in patients with PUO. The aim of this study was to evaluate the diagnostic yield and safety of EUS-FNA of enlarged adrenal in patients with PUO.

Methods

Data was analyzed from October 2010 to September 2016 at a single tertiary care center in northern India. EUS-FNA of enlarged adrenals was done in 52 patients for the etiological diagnosis of PUO in whom a definitive diagnosis could not be made with other means.

Results

The mean age was 48±14 years; 36 were males and 16 were females. EUS-FNA was done from the left adrenal in 50 patients and from the right sample in 2 patients. A technical success was achieved in 100% cases. The 19-G needle was used in the majority (75%) to the presence of necrotic areas in adrenals; median numbers of passes were 2. The cytopathological diagnoses were tuberculosis (n?=?36), histoplasmosis (n?=?13), lymphoma (n?=?2), and metastasis from undiagnosed neuroendocrine tumor of lung (n?=?1). Thus, a diagnosis could be made in 52/52 (100%) patients. None of the patients had any procedure-related complications.

Conclusions

EUS-FNA is a safe and effective method for evaluating etiology of PUO in patients with adrenal enlargement.
  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