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   21336篇
  免费   5103篇
  国内免费   70篇
耳鼻咽喉   122篇
儿科学   488篇
妇产科学   1669篇
基础医学   475篇
口腔科学   190篇
临床医学   15429篇
内科学   2498篇
皮肤病学   125篇
神经病学   871篇
特种医学   232篇
外科学   1322篇
综合类   40篇
预防医学   1946篇
眼科学   34篇
药学   310篇
中国医学   4篇
肿瘤学   754篇
  2024年   78篇
  2023年   781篇
  2022年   108篇
  2021年   280篇
  2020年   649篇
  2019年   240篇
  2018年   1127篇
  2017年   1376篇
  2016年   1456篇
  2015年   1514篇
  2014年   1567篇
  2013年   1862篇
  2012年   561篇
  2011年   837篇
  2010年   1131篇
  2009年   1421篇
  2008年   787篇
  2007年   716篇
  2006年   708篇
  2005年   574篇
  2004年   540篇
  2003年   490篇
  2002年   424篇
  2001年   509篇
  2000年   310篇
  1999年   457篇
  1998年   595篇
  1997年   702篇
  1996年   646篇
  1995年   580篇
  1994年   418篇
  1993年   344篇
  1992年   281篇
  1991年   278篇
  1990年   262篇
  1989年   203篇
  1988年   154篇
  1987年   151篇
  1986年   138篇
  1985年   159篇
  1984年   121篇
  1983年   110篇
  1982年   91篇
  1981年   99篇
  1980年   57篇
  1979年   102篇
  1978年   67篇
  1977年   71篇
  1976年   71篇
  1972年   86篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
The most common cause of illness in infancy and childhood is acute infection of the respiratory tract. Several recent studies have reported that life-threatening respiratory disease in infancy, such as pneumonia and bronchiolitis, is directly related to the smoking habits of parents. The effects of smoking are more hazardous to youngsters because babies and young children breathe more rapidly than adults. Because of this higher breathing rate, they inhale more air—and more pollution—in comparison to their total body weight. The harmful effects of cigarette smoking on infants and children and recommendations for specific interventions to minimize or eliminate this health hazard are discussed.  相似文献   
93.
A novel injectable scaffolding matrix (E-Matrix) has been developed to accelerate wound healing in diabetic foot ulcers. This porcine collagen-derived matrix is designed to mimic tertiary embryonic connective tissue and to stimulate fetal wound repair mechanisms including angiogenesis. In vitro and animal studies have indicated a beneficial effect on tissue growth and an acceptable safety profile. In this report, we describe the initial use of this product in a pilot study of six humans with chronic nonhealing diabetic foot ulcers. A dramatic initial response to injection was seen, with an average wound size reduction of 72% 2 weeks after injection. Randomized trials are underway to define the potential benefit of this new treatment modality for diabetic foot ulcers.  相似文献   
94.
95.
PROBLEM: To compare depressive symptoms in children with attention deficit hyperactivity disorder (ADHD) to those in healthy children, and to explore the influence of individual and family factors on level of depression. METHODS: Individual interviews with 68 children, ages 7 to 12 years, in order to complete the Children's Depression Inventory. FINDINGS: Children with ADHD reported significantly more depressive symptoms than did children without ADHD; 14.7% of children with ADHD reached the threshold of a 19 point score, which suggests clinical depression. No significant effects of individual and family factors on level of depression were found. CONCLUSIONS: Children with ADHD are more inclined to experience depressive symptoms than are healthy children. To plan appropriate interventions, nurses evaluating and working with children with ADHD should always consider a possible coexistence of depressive symptoms.  相似文献   
96.
97.
98.
This paper describes a complex set of patient and nursing data from 83 psychiatric wards. It explains how the data were collected and organized into a meaningful format using a quality league-table. The patient and nursing characteristics of high quality psychiatric wards ranking above the 74th percentile and the characteristics of low quality wards falling below the 26th percentile are compared and examined in detail. Startling similarities and differences in patient activity, nursing activity, and nursing quality in high and low quality wards are highlighted. Finally, some implications of the findings for nursing practice, management, and education are considered.  相似文献   
99.
The Stranger     
J Emerg Nurs 1998;24:622.  相似文献   
100.
The paper presents the results of a pilot study which involved 50 nurses from several departments of internal medicine of The State Clinical Hospital of the Collegium Medicum, Jagiellonian University in Cracow. The results are based on the Statement Response Questionnaire. They show that the most common responses of the nurses in the face of anxiety expressed by patients are cheering up the patient, collecting information about the symptom, and offering explanation of the symptom. The least common responses included expressing one's own positive emotions and showing empathy towards the patient.  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