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   1331244篇
  免费   90896篇
  国内免费   3897篇
耳鼻咽喉   19006篇
儿科学   40816篇
妇产科学   36230篇
基础医学   190252篇
口腔科学   37673篇
临床医学   116720篇
内科学   255398篇
皮肤病学   30513篇
神经病学   100474篇
特种医学   51642篇
外国民族医学   283篇
外科学   202338篇
综合类   29706篇
现状与发展   2篇
一般理论   317篇
预防医学   87354篇
眼科学   31858篇
药学   107188篇
  8篇
中国医学   4503篇
肿瘤学   83756篇
  2021年   9741篇
  2019年   9977篇
  2018年   14782篇
  2017年   11518篇
  2016年   12796篇
  2015年   14350篇
  2014年   19579篇
  2013年   27911篇
  2012年   38152篇
  2011年   40037篇
  2010年   23681篇
  2009年   22233篇
  2008年   36906篇
  2007年   39731篇
  2006年   40115篇
  2005年   37797篇
  2004年   35973篇
  2003年   34533篇
  2002年   33248篇
  2001年   77002篇
  2000年   78943篇
  1999年   65477篇
  1998年   16161篇
  1997年   14030篇
  1996年   13600篇
  1995年   12708篇
  1994年   11453篇
  1993年   10809篇
  1992年   47951篇
  1991年   45601篇
  1990年   44670篇
  1989年   43000篇
  1988年   38929篇
  1987年   37764篇
  1986年   35478篇
  1985年   33148篇
  1984年   23771篇
  1983年   19866篇
  1982年   10805篇
  1979年   20878篇
  1978年   13838篇
  1977年   12391篇
  1976年   10519篇
  1975年   12049篇
  1974年   13972篇
  1973年   13476篇
  1972年   12858篇
  1971年   12188篇
  1970年   11144篇
  1969年   10785篇
排序方式: 共有10000条查询结果,搜索用时 31 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.
10.
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   
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