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   83890篇
  免费   5042篇
  国内免费   1964篇
耳鼻咽喉   520篇
儿科学   1319篇
妇产科学   1047篇
基础医学   5994篇
口腔科学   1175篇
临床医学   7451篇
内科学   8750篇
皮肤病学   936篇
神经病学   4130篇
特种医学   1675篇
外国民族医学   6篇
外科学   6871篇
综合类   13924篇
现状与发展   1篇
一般理论   4篇
预防医学   8840篇
眼科学   1100篇
药学   14812篇
  123篇
中国医学   8438篇
肿瘤学   3780篇
  2024年   163篇
  2023年   1239篇
  2022年   2261篇
  2021年   3210篇
  2020年   2868篇
  2019年   2950篇
  2018年   2674篇
  2017年   2506篇
  2016年   2456篇
  2015年   2398篇
  2014年   5666篇
  2013年   5664篇
  2012年   5220篇
  2011年   6291篇
  2010年   5306篇
  2009年   4257篇
  2008年   4043篇
  2007年   4126篇
  2006年   3712篇
  2005年   3063篇
  2004年   2443篇
  2003年   2201篇
  2002年   1547篇
  2001年   1390篇
  2000年   1181篇
  1999年   1120篇
  1998年   809篇
  1997年   771篇
  1996年   613篇
  1995年   667篇
  1994年   634篇
  1993年   479篇
  1992年   468篇
  1991年   386篇
  1990年   347篇
  1989年   324篇
  1988年   348篇
  1987年   299篇
  1986年   294篇
  1985年   522篇
  1984年   530篇
  1983年   390篇
  1982年   427篇
  1981年   404篇
  1980年   404篇
  1979年   353篇
  1978年   325篇
  1977年   296篇
  1976年   240篇
  1975年   173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.
In this paper, we argue that understanding and addressing the problem of poor-quality medical products requires a more interdisciplinary approach than has been evident to date. While prospective studies based on rigorous standardized methodologies are the gold standard for measuring the prevalence of poor-quality medical products and understanding their distribution nationally and internationally, they should be complemented by social science research to unpack the complex set of social, economic, and governance factors that underlie these patterns. In the following sections, we discuss specific examples of prospective quality surveys and of social science studies, highlighting the value of cross-sector partnerships in driving high-quality, policy-relevant research in this area.  相似文献   
8.
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   
9.
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