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   23603篇
  免费   5312篇
  国内免费   93篇
耳鼻咽喉   121篇
儿科学   583篇
妇产科学   1737篇
基础医学   793篇
口腔科学   243篇
临床医学   15767篇
内科学   2952篇
皮肤病学   183篇
神经病学   1212篇
特种医学   295篇
外科学   1507篇
综合类   77篇
一般理论   2篇
预防医学   2105篇
眼科学   55篇
药学   372篇
中国医学   8篇
肿瘤学   996篇
  2024年   62篇
  2023年   839篇
  2022年   202篇
  2021年   376篇
  2020年   728篇
  2019年   358篇
  2018年   1244篇
  2017年   1473篇
  2016年   1554篇
  2015年   1631篇
  2014年   1688篇
  2013年   2025篇
  2012年   800篇
  2011年   1047篇
  2010年   1220篇
  2009年   1505篇
  2008年   967篇
  2007年   846篇
  2006年   808篇
  2005年   703篇
  2004年   640篇
  2003年   566篇
  2002年   501篇
  2001年   505篇
  2000年   295篇
  1999年   460篇
  1998年   620篇
  1997年   722篇
  1996年   651篇
  1995年   582篇
  1994年   437篇
  1993年   350篇
  1992年   266篇
  1991年   257篇
  1990年   254篇
  1989年   197篇
  1988年   152篇
  1987年   138篇
  1986年   138篇
  1985年   151篇
  1984年   119篇
  1983年   108篇
  1982年   96篇
  1981年   97篇
  1980年   67篇
  1979年   87篇
  1978年   72篇
  1977年   68篇
  1976年   72篇
  1972年   86篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
91.
Many people die in emergency departments (EDs) across the United States from sudden illnesses or injuries, an exacerbation of a chronic disease, or a terminal illness. Frequently, patients and families come to the ED seeking lifesaving or life-prolonging treatment. In addition, the ED is a place of transition-patients usually are transferred to an inpatient unit, transferred to another hospital, or discharged home. Rarely are patients supposed to remain in the ED. Currently, there is an increasing amount of literature related to end-of-life care. However, these end-of-life care models are based on chronic disease trajectories and have difficulty accommodating sudden-death trajectories common in the ED. There is very little information about end-of-life care in the ED. This article explores ED culture and characteristics, and examines the applicability of current end-of-life care models.  相似文献   
92.
93.
Since the mid-1970s, the Margaret Sanger Center of Planned Parenthood of New York City has prepared nurses and nurse midwives from less developed countries to be family-planning nurse practitioners. These nurse practitioners then provide services to patients, train other staff, and manage integrated family-planning clinics. More than 120 nurses and nurse midwives have arrived in groups of 10 at the Sanger Center, with 72 attending since 1981. Each course lasts 10 weeks. The core curriculum provides trainees with skills in women's health care including contraception, in training and advocacy, and in management of clinics. Whether, in the current period of scarce resources, cross-cultural training programs of this type remain a worthwhile investment, and if so, which of their components are most important to this success, is assessed.  相似文献   
94.
95.
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   
96.
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   
97.
98.
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   
99.
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