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   4695篇
  免费   345篇
  国内免费   3篇
耳鼻咽喉   47篇
儿科学   168篇
妇产科学   54篇
基础医学   721篇
口腔科学   147篇
临床医学   503篇
内科学   852篇
皮肤病学   46篇
神经病学   361篇
特种医学   559篇
外科学   489篇
综合类   34篇
预防医学   219篇
眼科学   32篇
药学   524篇
中国医学   1篇
肿瘤学   286篇
  2023年   22篇
  2022年   33篇
  2021年   48篇
  2020年   44篇
  2019年   49篇
  2018年   70篇
  2017年   66篇
  2016年   89篇
  2015年   98篇
  2014年   128篇
  2013年   179篇
  2012年   209篇
  2011年   219篇
  2010年   153篇
  2009年   128篇
  2008年   235篇
  2007年   205篇
  2006年   201篇
  2005年   186篇
  2004年   170篇
  2003年   152篇
  2002年   173篇
  2001年   158篇
  2000年   157篇
  1999年   133篇
  1998年   100篇
  1997年   115篇
  1996年   108篇
  1995年   100篇
  1994年   101篇
  1993年   90篇
  1992年   94篇
  1991年   80篇
  1990年   81篇
  1989年   94篇
  1988年   93篇
  1987年   79篇
  1986年   73篇
  1985年   68篇
  1984年   46篇
  1983年   40篇
  1982年   46篇
  1981年   29篇
  1980年   37篇
  1979年   29篇
  1978年   31篇
  1977年   36篇
  1976年   33篇
  1975年   47篇
  1974年   21篇
排序方式: 共有5043条查询结果,搜索用时 15 毫秒
991.
The influence of dinner music on food intake and symptoms common in dementia such as depressed mood, irritability and restlessness was studied. The study was carried out in a nursing-home ward in Sweden. Soothing music was played as dinner music for two weeks, Swedish tunes from the 1920s and 1930s for two weeks and pop music for two weeks. Prior to these periods, there was one week without music, and at the end of the intervention there was a two-week control period. The effects of the intervention were assessed by psychological ratings and by weighing the food helpings. It was found that during all three music periods the patients ate more in total. The difference was particularly significant for the dessert. The staff were thought to be influenced by the music, as they served the patients more food, both main course and dessert, whenever music was played. The patients were less irritable, anxious and depressed during the music periods. The results of the study suggest that dinner music, particularly soothing music, can reduce irritability, fear-panic and depressed mood and can stimulate demented patients in a nursing-home ward into eating more.  相似文献   
992.
Because degenerative changes in the trapeziometacarpal joint are a common cause of pain and weakness of the thumb, particularly in postmenopausal women, we have evaluated the functional and radiological results of arthrodesis in 43 patients. Arthrodesis is a safe and effective way of treating isolated painful arthritis in the trapeziometacarpal joint; solid fusion occurred in 39 cases, and four patients had fibrous union. All but four patients were satisfied with the operation including three of the four patients with fibrous union. Thirty-one of the patients had no functional restrictions (decreased range of movement), 34 were free of pain at rest, and 25 were free of pain all the time.  相似文献   
993.
994.
The effects of integrity-promoting care in a nursing home with demented patients were studied. In one ward the staff were given special training. The results showed that the treatment induced a reduction of distractability, confusion, anxiety and depressed mood, and improvement in motor performance. At the same time the cerebrospinal fluid concentrations of somatostatin increased.  相似文献   
995.
The regulation of the fluid balance of the mucus is important for a good function of the mucociliary system in the nose. The nasal glands and the goblet cells have been proposed to be the main source of fluid. Microvilli-equipped epithelial cells, ciliated and nonciliated, constituting 70% to 90% of the cells on the turbinates in the nose, are of importance for the regulation of the hydration of the mucus. These cells have the same characteristics as other fluid-secreting cells elsewhere in the body. They have microvilli, a terminal web, folding of the basolateral membrane, and numerous cell organelles. Blockage of the energy supply strongly reduces the fluid secretion.  相似文献   
996.
We present a comparative study between headache clinic populations from 2 inherently different regions of the United States. Using standardized methods, 1 of us (JFR) prospectively evaluated 578 new patients attending the headache clinic at the University of California in San Diego. In a similar manner, we subsequently evaluated 115 new patients presenting to the headache clinic at the University of South Alabama in Mobile, Alabama. We found few differences between the 2 populations. These differences more likely reflect regional variations in healthcare delivery or methodologic artifact than intrinsic dissimilarities.  相似文献   
997.
The growth curves of all nonimmigrant school-age children living in one district of Malm?, Sweden and treated at the Department of Child and Youth Psychiatry during 1983 were investigated. The study group consisted of 40 children. Twenty-five of these children (63%) showed abnormal growth compared to 6 children (15%) with abnormal growth in an age-and sex-matched nonpsychiatric control population (p less than 0.001). A majority of the children with abnormal growth exhibited deviant growth within the first 4 years of life, usually several years before showing any psychiatric symptoms. These results, if borne out by additional studies, may have important clinical applications in the fields of developmental medicine and child psychiatry.  相似文献   
998.
Human neutrophils were isolated from cord blood drawn after Caesarean section deliveries without labour and from peripheral blood from healthy adults. The alkaline phosphatase (ALP) activity in the cell populations was compared with the release of respiratory burst products after activation with the chemoattractant n-formyl-methionyl-leucyl-phenylalanine (fMLP). In contrast to cord blood neutrophils obtained from babies after normal vaginal deliveries, the Caesarean section neutrophils were not metabolically primed. However, like the neutrophils from vaginally delivered babies, the Caesarean section neutrophils showed an increased ALP activity compared to adult control neutrophils. These findings indicate that priming of cord blood neutrophils appears to be induced by labour and can be dissociated from increased ALP activity.  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