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   1254篇
  免费   58篇
  国内免费   2篇
耳鼻咽喉   30篇
儿科学   52篇
妇产科学   39篇
基础医学   170篇
口腔科学   45篇
临床医学   165篇
内科学   233篇
皮肤病学   24篇
神经病学   45篇
特种医学   27篇
外科学   127篇
综合类   16篇
预防医学   72篇
眼科学   38篇
药学   154篇
中国医学   19篇
肿瘤学   58篇
  2023年   11篇
  2022年   33篇
  2021年   47篇
  2020年   20篇
  2019年   29篇
  2018年   48篇
  2017年   41篇
  2016年   27篇
  2015年   43篇
  2014年   44篇
  2013年   69篇
  2012年   111篇
  2011年   108篇
  2010年   56篇
  2009年   55篇
  2008年   63篇
  2007年   86篇
  2006年   73篇
  2005年   52篇
  2004年   74篇
  2003年   64篇
  2002年   73篇
  2001年   12篇
  2000年   11篇
  1999年   10篇
  1998年   7篇
  1996年   4篇
  1995年   2篇
  1992年   1篇
  1991年   3篇
  1990年   3篇
  1989年   5篇
  1988年   2篇
  1987年   1篇
  1986年   1篇
  1985年   1篇
  1983年   1篇
  1981年   1篇
  1980年   1篇
  1979年   1篇
  1977年   5篇
  1976年   1篇
  1974年   2篇
  1971年   1篇
  1969年   1篇
  1968年   1篇
  1967年   1篇
  1966年   1篇
  1965年   2篇
  1947年   2篇
排序方式: 共有1314条查询结果,搜索用时 15 毫秒
31.

BACKGROUND  

Care for patients with advanced heart failure (HF) has traditionally focused on managing HF alone; however, little is known about the prevalence and contribution of comorbidity to mortality among this population. We compared the impact of comorbidity on mortality in older adults with HF with high mortality risk and those with lower mortality risk, as defined by presence or absence of a prior hospitalization for HF, respectively.  相似文献   
32.
33.
Rationale: Elevated long pentraxin-3 (PTX3) levels are associated with the development of primary graft dysfunction (PGD) after lung transplantation. Abnormalities in innate immunity, mediated by PTX3 release, may play a role in PGD pathogenesis. Objectives: Our goal was to test whether variants in the gene encoding PTX3 are risk factors for PGD. Methods: We performed a candidate gene association study in recipients from the multicenter, prospective Lung Transplant Outcomes Group cohort enrolled between July 2002 and July 2009. The primary outcome was International Society for Heart and Lung Transplantation grade 3 PGD within 72 hours of transplantation. Targeted genotyping of 10 haplotype-tagging PTX3 single-nucleotide polymorphisms (SNPs) was performed in lung transplant recipients. The association between PGD and each SNP was evaluated by logistic regression, adjusting for pretransplantation lung disease, cardiopulmonary bypass use, and population stratification. The association between SNPs and plasma PTX3 levels was tested across genotypes in a subset of recipients with idiopathic pulmonary fibrosis. Measurements and Main Results: Six hundred fifty-four lung transplant recipients were included. The incidence of PGD was 29%. Two linked 5' region variants, rs2120243 and rs2305619, were associated with PGD (odds ratio, 1.5; 95% confidence interval, 1.1 to 1.9; P = 0.006 and odds ratio, 1.4; 95% confidence interval, 1.1 to 1.9; P = 0.007, respectively). The minor allele of rs2305619 was significantly associated with higher plasma PTX3 levels measured pretransplantation (P = 0.014) and at 24 hours (P = 0.047) after transplantation in patients with idiopathic pulmonary fibrosis. Conclusions: Genetic variants of PTX3 are associated with PGD after lung transplantation, and are associated with increased PTX3 plasma levels.  相似文献   
34.
35.
36.

Objectives:

The primary objective was to examine the safety and feasibility of robotic-assisted laparoscopy in a cohort of women treated surgically for stage III and IV endometriosis. The secondary objective was to explore whether the stage of endometriosis affected surgical outcome.

Methods:

In this cohort study, 43 women with severe endometriosis were treated with robot-assisted laparoscopic hysterectomy with unilateral or bilateral salpingo-oophorectomy for stage III (n = 19) or stage IV (n = 24) disease.

Results:

Histopathologic evaluation confirmed endometriosis in all patients, and fibroids were also shown in 12 patients. The median actual operative time was 145 min (range, 67–325 min), and the median blood loss was 100 mL (range, 20–400 mL). All but one of the procedures were completed successfully robotically. The length of hospital stay was 1 d for 95% of patients (41 of 43), and 2 patients had prolonged stays of 4 d and 5 d, respectively. One patient was readmitted for a vaginal cuff abscess; this represented the only complication identified in this series.

Conclusions:

Robot-assisted laparoscopic surgery appears to be a reasonably safe and feasible method for the definitive surgical management of women with severe endometriosis.  相似文献   
37.
38.
39.
40.
Kimura disease is a rare form of chronic inflammatory disorder involving subcutaneous tissue, predominantly in the head and neck region and frequently associated with regional lymphadenopathy and/or salivary gland involvement. We present a case of Kimura disease in a 28-year-old male which showed florid squamous metaplasia in the salivary gland ducts and salivary duct inclusions in the intraparotid nodes besides the usual features of Kimura disease. The squamous metaplasia was extensive enough to pose a diagnostic dilemma. We describe this case to highlight the rare histological finding of florid squamous metaplasia in Kimura disease and its diagnostic implications.  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