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   87212篇
  免费   5750篇
  国内免费   2711篇
耳鼻咽喉   869篇
儿科学   1359篇
妇产科学   979篇
基础医学   10674篇
口腔科学   1821篇
临床医学   8301篇
内科学   10063篇
皮肤病学   660篇
神经病学   6891篇
特种医学   3026篇
外国民族医学   7篇
外科学   10197篇
综合类   14018篇
现状与发展   8篇
一般理论   4篇
预防医学   6339篇
眼科学   1644篇
药学   7687篇
  117篇
中国医学   8962篇
肿瘤学   2047篇
  2024年   297篇
  2023年   1423篇
  2022年   2664篇
  2021年   3426篇
  2020年   3148篇
  2019年   3156篇
  2018年   2843篇
  2017年   2654篇
  2016年   2475篇
  2015年   2348篇
  2014年   5086篇
  2013年   4910篇
  2012年   4577篇
  2011年   5526篇
  2010年   4958篇
  2009年   3976篇
  2008年   3797篇
  2007年   4085篇
  2006年   3755篇
  2005年   3199篇
  2004年   2746篇
  2003年   2602篇
  2002年   1937篇
  2001年   1707篇
  2000年   1441篇
  1999年   1315篇
  1998年   1223篇
  1997年   1214篇
  1996年   1038篇
  1995年   992篇
  1994年   914篇
  1993年   768篇
  1992年   742篇
  1991年   696篇
  1990年   600篇
  1989年   567篇
  1988年   536篇
  1987年   455篇
  1986年   414篇
  1985年   689篇
  1984年   651篇
  1983年   467篇
  1982年   586篇
  1981年   552篇
  1980年   494篇
  1979年   437篇
  1978年   405篇
  1977年   351篇
  1976年   288篇
  1975年   149篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
5.
6.
PurposeTo review and to compare indirectly the outcomes of minimally invasive therapies for the treatment of lower urinary tract symptoms secondary to benign prostatic hyperplasia.Materials and MethodsA literature search via Medline and Cochrane Central databases was completed for randomized control studies published between January 2000 to April 2020 for the following therapies: Rezum, Urolift, Aquablation, and prostatic artery embolization (PAE). Data on the following variables were included: International prostate symptom score (IPSS), maximum urinary flow rate, quality of life, and postvoid residual (PVR). Standard mean differences between treatments were compared through a meta-analysis using transurethral resection of the prostate (TURP) to assess differences in treatment effect.ResultsThere was no significant difference in outcomes between therapies for IPSS at the 3, 6, and 12-month follow ups. Although outcomes for Rezum were only available out to 3 months, there were no consistently significant differences in outcomes when comparing Aquablation versus PAE versus Rezum. TURP PVR was significantly better than Urolift at 3, 6, and 12 months. No significant differences in minor or major adverse events were noted.ConclusionAlthough significant differences in outcomes were limited, Aquablation and PAE were the most durable at 12 months. PAE has been well studied on multiple randomized control trials with minimal adverse events while Aquablation has limited high quality data and has been associated with bleeding-related complications.  相似文献   
7.
Background/PurposeA small number of Hirschsprung disease (HD) patients develop inflammatory bowel disease (IBD)-like symptoms after pullthrough surgery. The etiology and pathophysiology of Hirschsprung-associated IBD (HD-IBD) remains unknown. This study aims to further characterize HD-IBD, to identify potential risk factors and to evaluate response to treatment in a large group of patients.MethodsRetrospective study of patients diagnosed with IBD after pullthrough surgery between 2000 and 2021 at 17 institutions. Data regarding clinical presentation and course of HD and IBD were reviewed. Effectiveness of medical therapy for IBD was recorded using a Likert scale.ResultsThere were 55 patients (78% male). 50% (n = 28) had long segment disease. Hirschsprung-associated enterocolitis (HAEC) was reported in 68% (n = 36). Ten patients (18%) had Trisomy 21. IBD was diagnosed after age 5 in 63% (n = 34). IBD presentation consisted of colonic or small bowel inflammation resembling IBD in 69% (n = 38), unexplained or persistent fistula in 18% (n = 10) and unexplained HAEC >5 years old or unresponsive to standard treatment in 13% (n = 7). Biological agents were the most effective (80%) medications. A third of patients required a surgical procedure for IBD.ConclusionMore than half of the patients were diagnosed with HD-IBD after 5 years old. Long segment disease, HAEC after pull through operation and trisomy 21 may represent risk factors for this condition. Investigation for possible IBD should be considered in children with unexplained fistulae, HAEC beyond the age of 5 or unresponsive to standard therapy, and symptoms suggestive of IBD. Biological agents were the most effective medical treatment.Level of EvidenceLevel 4  相似文献   
8.
9.
Cutaneous leiomyomas are rare benign smooth‐muscle tumors. These lesions are distinguished based on their cell of origin and are subclassified as pilar leiomyoma, angioleiomyoma, and genital‐type leiomyoma. Nipple leiomyoma is the least common genital‐type leiomyoma, arising from the dartoic muscle cell of the nipple. Histologic examination of the lesion is necessary for definitive diagnosis, and these uncommon tumors can pose a diagnostic challenge. We describe herein a series of six nipple leiomyomas with a spectrum of histologic appearances.  相似文献   
10.
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