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   468851篇
  免费   30681篇
  国内免费   3521篇
耳鼻咽喉   6226篇
儿科学   10966篇
妇产科学   12317篇
基础医学   65268篇
口腔科学   13837篇
临床医学   37443篇
内科学   98060篇
皮肤病学   10513篇
神经病学   35613篇
特种医学   17507篇
外国民族医学   105篇
外科学   73346篇
综合类   11580篇
现状与发展   1篇
一般理论   109篇
预防医学   22696篇
眼科学   10935篇
药学   38357篇
  4篇
中国医学   2696篇
肿瘤学   35474篇
  2021年   4243篇
  2020年   2710篇
  2019年   4230篇
  2018年   6400篇
  2017年   4885篇
  2016年   5033篇
  2015年   5782篇
  2014年   8017篇
  2013年   10816篇
  2012年   14556篇
  2011年   14938篇
  2010年   9284篇
  2009年   8575篇
  2008年   13674篇
  2007年   14672篇
  2006年   14391篇
  2005年   13293篇
  2004年   13129篇
  2003年   12753篇
  2002年   12468篇
  2001年   31819篇
  2000年   32299篇
  1999年   26507篇
  1998年   6252篇
  1997年   5098篇
  1996年   4602篇
  1995年   4236篇
  1994年   3765篇
  1993年   3483篇
  1992年   17763篇
  1991年   16515篇
  1990年   15604篇
  1989年   15353篇
  1988年   13861篇
  1987年   13223篇
  1986年   12240篇
  1985年   11337篇
  1984年   7665篇
  1983年   6285篇
  1982年   3154篇
  1979年   6035篇
  1978年   3755篇
  1977年   3332篇
  1975年   3062篇
  1974年   3532篇
  1973年   3316篇
  1972年   3244篇
  1971年   3164篇
  1970年   2864篇
  1969年   2900篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.
Inflammation, an important contributory factor of muscle and bone aging, is potentially modulated by diet. This study examined the associations of dietary inflammatory index (DII) score with musculoskeletal parameters and related disease outcomes in 3995 community-dwelling Chinese men and women aged ≥65 years in Hong Kong. DII score at baseline was estimated from a food frequency questionnaire. Bone mineral density (BMD) and muscle mass estimated by dual-energy X-ray absorptiometry (DXA), hand grip strength, gait speed, and chair stand test were measured at baseline, year 4, and year 14. The associations of DII score with the longitudinal changes of musculoskeletal parameters, and incidence of osteoporosis, sarcopenia, and fractures were examined by using general linear model, multinomial logistic regression model, and Cox proportional hazards regression model, respectively. After multiple adjustments, each tertile increase in DII score in men was associated with 0.37 (95% confidence interval [CI], 0.10–0.64) kg loss in grip strength and 0.02 (95% CI, 0.01–0.03) m/s loss in gait speed over 4 years. In men, the highest tertile of DII was associated with a higher risk of incident fractures, with adjusted and competing death adjusted hazard ratio (HR) (95% CI) of 1.56 (1.14–2.14) and 1.40 (1.02–1.91), respectively. In women, DII score was not significantly associated with any muscle-related outcomes or incidence of fracture, but a significant association between higher DII score and risk of osteoporosis at year 14 was observed, with the highest tertile of DII score having adjusted odds ratio (OR) (95% CI) of 1.90 (1.03–3.52). In conclusion, pro-inflammatory diet consumption promoted loss of muscle strength and physical function, and increased risk of fractures in older Chinese men. Pro-inflammatory diets had no significant association with muscle related outcomes but increased the long-term risk of osteoporosis in older Chinese women. © 2022 American Society for Bone and Mineral Research (ASBMR).  相似文献   
94.
95.
96.
97.
Postoperative complications(PC) are a basic health outcome, but no surgery service in the world records and/or audits the PC associated with all the surgical procedures it performs. Most studies that have assessed the cost of PC suffer from poor quality and a lack of transparency and consistency. The payment system in place often rewards the volume of services provided rather than the quality of patients' clinical outcomes. Without a thorough registration of PC, the economic costs involved cannot be determined. An accurate, reliable appraisal would help identify areas for investment in order to reduce the incidence of PC,improve surgical results, and bring down the economic costs. This article describes how to quantify and classify PC using the Clavien-Dindo classification and the comprehensive complication index, discusses the perspectives from which economic evaluations are performed and the minimum postoperative follow-up established, and makes various recommendations. The availability of accurate and impartially audited data on PC will help reduce their incidence and bring down costs. Patients, the health authorities, and society as a whole are sure to benefit.  相似文献   
98.
99.
Abstract

Purpose: We examined underlying psychosocial processes of a behavioral treatment for urinary incontinence (UI) of prostate cancer survivors.

Design: Secondary analysis of data collected from a clinical trial.

Sample: Two hundred forty-four prostate cancer survivors who participated in a clinical trial of behavioral intervention to UI as intervention or control subjects.

Methods: The participants had a 3-month behavioral intervention or usual care and were followed up for an additional 3?months. They were assessed at baseline, 3, and 6?months. Latent growth curve models were performed to examine trajectories of each study variable and relationships among the variables.

Findings: Increasing self-efficacy and social support were significantly and independently associated with more reduction of urinary leakage frequency over time.

Implications for psychosocial oncology: Providing problem-solving skills and social support, including peer support, are essential for empowering patients to reduce UI.  相似文献   
100.
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