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   382657篇
  免费   24540篇
  国内免费   7463篇
耳鼻咽喉   4246篇
儿科学   10322篇
妇产科学   7044篇
基础医学   30469篇
口腔科学   8690篇
临床医学   45731篇
内科学   45827篇
皮肤病学   4798篇
神经病学   21591篇
特种医学   8208篇
外国民族医学   33篇
外科学   39646篇
综合类   55435篇
现状与发展   13篇
一般理论   37篇
预防医学   44946篇
眼科学   5564篇
药学   32370篇
  557篇
中国医学   33973篇
肿瘤学   15160篇
  2024年   4402篇
  2023年   7384篇
  2022年   11325篇
  2021年   15418篇
  2020年   14945篇
  2019年   20714篇
  2018年   17783篇
  2017年   14670篇
  2016年   11951篇
  2015年   11188篇
  2014年   21886篇
  2013年   24509篇
  2012年   19896篇
  2011年   21429篇
  2010年   17170篇
  2009年   15930篇
  2008年   15542篇
  2007年   16060篇
  2006年   13954篇
  2005年   12099篇
  2004年   9895篇
  2003年   8623篇
  2002年   6804篇
  2001年   6156篇
  2000年   5103篇
  1999年   4374篇
  1998年   3587篇
  1997年   3444篇
  1996年   2928篇
  1995年   2795篇
  1994年   2653篇
  1993年   2116篇
  1992年   2134篇
  1991年   1849篇
  1990年   1634篇
  1989年   1429篇
  1988年   1374篇
  1985年   3821篇
  1984年   4830篇
  1983年   3366篇
  1982年   3830篇
  1981年   3569篇
  1980年   3179篇
  1979年   2916篇
  1978年   2551篇
  1977年   1918篇
  1976年   2158篇
  1975年   1644篇
  1974年   1435篇
  1973年   1277篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
PurposeDevelopmental dysplasia of the hip (DDH) is a term used to cover a broad spectrum of anomalies ranging from mild dysplasia to high-riding dislocations. We report the management of DDH in children using the Dega osteotomy and their long-term follow-up.MethodsFifty-eight hips from 48 children younger than 8 years treated using the Dega osteotomy between January 1988 and October 2000 were included in this multcenter study. Both prospective (41 hips) and retrospective (17 hips) cases were included, and follow-up was for a minimum of 13 years. Radiographs were made preoperatively, immediately postoperatively, after 6 weeks or at removal of the spica cast if any, at 6-month intervals and/or as indicated for 3 years postoperatively and then on annual basis until the last follow-up. A single-cut computed tomographic scan was performed for all prospective patients. Special attention was paid to the predictive measures of hip arthrosis and the survival of the hip after Dega osteotomy. ResultsThe final clinical outcome was favorable in 44 hips (75.9 %). Eleven hips needed a second surgery (acetabuloplasty and/or arthroplasty) during the follow-up period.Conclusions In our pediatric patient population the Dega osteotomy proved to be an adequate measure for the management of this complex condition. The worst complication was avascular necrosis, and all of the affected hips ended with failure (pain, another surgery, or both).  相似文献   
992.
993.
994.

Purpose

To assess the outcome of transurethral plasmakinetic vaporization (PKVP) in the management of benign prostatic hyperplasia (BPH).

Patients and methods

From August 2010 to May 2012, 60 patients with obstructive LUTS due to BPH were included in the study. All patients were evaluated by International Prostate Symptom Score (IPSS), general examination, digital rectal examination, PSA, routine laboratory examinations, pelvi-abdominal ultrasound, trans-rectal ultrasound, and uroflowmetry. Patients with Qmax of <10 mL/sec., an IPSS of >8 and a prostate volume of >40 mL underwent transurethral PKVP.

Results

Mean age of the patients was 66.8±4.5 years. The mean times of the operation, post-operative bladder irrigation, and post-operative catheterization were 63.8±13.9 minutes, 15.2±5.7 hours, and 23.9±5.2 hours, respectively. At 3 months of follow-up, there were significant reductions in the mean IPSS from 23.4±3.5 to 9.2±3.7 (P=0.4), mean PSA from 3.03±2.2 ng/mL to 1.2±1.04 ng/mL (P value=0.02), mean post voiding residual urine from 149.8±59.5 mL to 46.9±24.1 mL (P value <0.01), and mean prostate volume from 72.8±10.3 mL to 22.7±6.1 mL (P value <0.01). Also, there was a statistically significant increase in the mean Q max. from 8.7±2.4 mL/s to 19.5±3.5 mL/s (P value <0.01).

Conclusion

PKVP is an effective and safe treatment option in the management of symptomatic BPH.  相似文献   
995.
996.
997.
998.
Malignant rhabdoid tumors (MRTs) are exceedingly rare lesions. To our knowledge, only 2 cases have been reported in the oral cavity, with both examples occurring in infants. The current case is the third reported case of MRT of the oral cavity and the first reported case to occur in an adult at this location. The following report describes the clinical, histologic and immunohistochemical features of this tumor.  相似文献   
999.
1000.
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