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   1329754篇
  免费   90883篇
  国内免费   3885篇
耳鼻咽喉   18981篇
儿科学   40798篇
妇产科学   36180篇
基础医学   190050篇
口腔科学   37650篇
临床医学   116626篇
内科学   255254篇
皮肤病学   30301篇
神经病学   100383篇
特种医学   51553篇
外国民族医学   284篇
外科学   202279篇
综合类   29705篇
现状与发展   2篇
一般理论   323篇
预防医学   87245篇
眼科学   31730篇
药学   107098篇
  8篇
中国医学   4475篇
肿瘤学   83597篇
  2021年   9682篇
  2019年   9959篇
  2018年   14744篇
  2017年   11491篇
  2016年   12728篇
  2015年   14261篇
  2014年   19498篇
  2013年   27830篇
  2012年   38068篇
  2011年   39959篇
  2010年   23612篇
  2009年   22190篇
  2008年   36850篇
  2007年   39686篇
  2006年   40095篇
  2005年   37753篇
  2004年   35963篇
  2003年   34515篇
  2002年   33238篇
  2001年   77028篇
  2000年   78970篇
  1999年   65495篇
  1998年   16176篇
  1997年   14040篇
  1996年   13616篇
  1995年   12710篇
  1994年   11458篇
  1993年   10816篇
  1992年   47970篇
  1991年   45618篇
  1990年   44690篇
  1989年   43011篇
  1988年   38943篇
  1987年   37770篇
  1986年   35484篇
  1985年   33157篇
  1984年   23776篇
  1983年   19878篇
  1982年   10810篇
  1979年   20888篇
  1978年   13842篇
  1977年   12390篇
  1976年   10525篇
  1975年   12052篇
  1974年   13976篇
  1973年   13479篇
  1972年   12857篇
  1971年   12191篇
  1970年   11146篇
  1969年   10787篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
Quality of Life Research - The COVID-19 pandemic might add to the stressors experienced by people living with rheumatic diseases. This study aimed to examine rheumatic patients’ functional...  相似文献   
3.
Molnár  B.  Aroca  S.  Dobos  A.  Orbán  K.  Szabó  J.  Windisch  P.  Stähli  A.  Sculean  A. 《Clinical oral investigations》2022,26(12):7135-7142
Clinical Oral Investigations - To evaluate t he long-term outcomes following treatment of RT 1 multiple adjacent gingival recessions (MAGR) using the modified coronally advanced tunnel (MCAT) with...  相似文献   
4.

Physical activity brings significant health benefits to middle-aged adults, although the research to date has been focused on late adulthood. This study aims to examine how ageing affects the self-reported and accelerometer-derived measures of physical activity levels in middle-aged adults. We employed the data recorded in the UK Biobank and analysed the physical activity levels of 2,998 participants (1381 men and 1617 women), based on self-completion questionnaire and accelerometry measurement of physical activity. We also assessed the musculoskeletal health of the participants using the dual-energy X-ray absorptiometry (DXA) measurements provided by the UK Biobank. Participants were categorised into three groups according to their age: group I younger middle-aged (40 to 49 years), group II older middle-aged (50 to 59 years), and group III oldest middle-aged (60 to 69 years). Self-reported physical activity level increased with age and was the highest in group III, followed by group II and I (P?<?0.05). On the contrary, physical activity measured by accelerometry decreased significantly with age from group I to III (P?<?0.05), and the same pertained to the measurements of musculoskeletal health (P?<?0.05). It was also shown that middle-aged adults mostly engaged in low and moderate intensity activities. The opposing trends of the self-reported and measured physical activity levels may suggest that middle-aged adults over-report their activity level as they age. They should be aware of the difference between their perceived and actual physical activity levels, and objective measures would be useful to prevent the decline in musculoskeletal health.

  相似文献   
5.
6.
7.
8.
9.
Inflammatory bowel disease (IBD) is a chronic disease that requires chronic treatment throughout the evolution of the disease, with a complex physiopathology that entails great challenges for the development of new and specific treatments for ulcerative colitis and Crohn´s disease. The anti-tumor necrosis factor alpha therapy has impacted the clinical course of IBD in those patients who do not respond to conventional treatment, so there is a need to develop new therapies and markers of treatment response. Various pathways involved in the development of the disease are known and the new therapies have focused on blocking the inflammatory process at the gastrointestinal level by oral, intravenous, subcutaneous, and topical route. All these new therapies can lead to more personalized treatments with higher success rates and fewer relapses. These treatments have not only focused on clinical remission, but also on achieving macroscopic changes at the endoscopic level and microscopic changes by achieving mucosal healing. These treatments are mainly based on modifying signaling pathways, by blocking receptors or ligands, reducing cell migration and maintaining the integrity of the epithelial barrier. Therefore, this review presents the efficacy and safety of the new treatments that are currently under study and the advances that have been made in this area in recent years.  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