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   1359073篇
  免费   95857篇
  国内免费   4597篇
耳鼻咽喉   19944篇
儿科学   40541篇
妇产科学   38987篇
基础医学   190147篇
口腔科学   40228篇
临床医学   115626篇
内科学   266126篇
皮肤病学   30469篇
神经病学   107685篇
特种医学   54380篇
外国民族医学   450篇
外科学   210738篇
综合类   34349篇
现状与发展   12篇
一般理论   438篇
预防医学   93475篇
眼科学   31908篇
药学   102377篇
  17篇
中国医学   3981篇
肿瘤学   77649篇
  2018年   12509篇
  2016年   11208篇
  2015年   12822篇
  2014年   17941篇
  2013年   26256篇
  2012年   34646篇
  2011年   36563篇
  2010年   21743篇
  2009年   21070篇
  2008年   34760篇
  2007年   37832篇
  2006年   38434篇
  2005年   37285篇
  2004年   35844篇
  2003年   34821篇
  2002年   34265篇
  2001年   64108篇
  2000年   65936篇
  1999年   56041篇
  1998年   15081篇
  1997年   13900篇
  1996年   13274篇
  1995年   12553篇
  1994年   11715篇
  1992年   43002篇
  1991年   41476篇
  1990年   40763篇
  1989年   39753篇
  1988年   37128篇
  1987年   36531篇
  1986年   35007篇
  1985年   33223篇
  1984年   24865篇
  1983年   21101篇
  1982年   12685篇
  1981年   11596篇
  1979年   23940篇
  1978年   17079篇
  1977年   14843篇
  1976年   13392篇
  1975年   15273篇
  1974年   18094篇
  1973年   17574篇
  1972年   16826篇
  1971年   15727篇
  1970年   14924篇
  1969年   14356篇
  1968年   13469篇
  1967年   12021篇
  1966年   11262篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
103.
It is well known that a meta-analysis of randomized controlled trials aims to increase the power and precision of the estimated intervention effects. However, when a meta-analysis includes a limited number of patients and a small number of events, overestimation of intervention effect estimates may occur and could cause spurious results. Although many biases can cause the overestimation, random error may be the most common cause. Trial sequential analysis (TSA) can explore the independent effect of random error on intervention effect estimates in meta-analyses and protect meta-analyses against overestimation due to random error.  相似文献   
104.
105.
Osteomyelitis, or the infection of the bone, presents a major complication in orthopedics and may lead to prolonged hospital visits, implant failure, and in more extreme cases, amputation of affected limbs. Typical treatment for this disease involves surgical debridement followed by long-term, systemic antibiotic administration, which contributes to the development of antibiotic-resistant bacteria and has limited ability to eradicate challenging biofilm-forming pathogens including Staphylococcus aureus—the most common cause of osteomyelitis. Local delivery of high doses of antibiotics via traditional bone cement can reduce systemic side effects of an antibiotic. Nonetheless, growing concerns over burst release (then subtherapeutic dose) of antibiotics, along with microbial colonization of the nondegradable cement biomaterial, further exacerbate antibiotic resistance and highlight the need to engineer alternative antimicrobial therapeutics and local delivery vehicles with increased efficacy against, in particular, biofilm-forming, antibiotic-resistant bacteria. Furthermore, limited guidance exists regarding both standardized formulation protocols and validated assays to predict efficacy of a therapeutic against multiple strains of bacteria. Ideally, antimicrobial strategies would be highly specific while exhibiting a broad spectrum of bactericidal activity. With a focus on S. aureus infection, this review addresses the efficacy of novel therapeutics and local delivery vehicles, as alternatives to the traditional antibiotic regimens. The aim of this review is to discuss these components with regards to long bone osteomyelitis and to encourage positive directions for future research efforts.  相似文献   
106.
107.
108.
109.
Type 1 diabetes is one of the commonest chronic disorders encountered in children and adolescents. When it first becomes apparent in children, approximately 20% of them have clinical and biochemical signs of ketoacidosis (DKA). In the presence of unusual clinical symptoms it is necessary to consider the possibility of associated conditions, such as coeliac disease, immunothyroiditis and Addison’s disease. Children with diabetes must be treated by a multidisciplinary team made up of paediatrician, paediatric diabetes specialist, psychologist, social worker, ophthalmologist, dietitian, nurse and diabetes counsellor, making it essential for them to be treated in regional specialised centres. They are treated in their own psychosocial environment and their families are involved in the therapy. Comprehensive, multidisciplinary treatment strategies have now made it possible for these patients to enjoy normal physical wellbeing and near-normal psychosocial development. Prevention and early treatment of of disturbances associated with diabetes remain an important concern. The fact that type 2 diabetes must now be looked for in overweight children and adolescents is a new aspect of diabetes medicine.  相似文献   
110.
According to the current nutritional recommendations issued by professional diabetes and nutrition associations, diabetic patients should keep to a diet consisting of 45–60% carbohydrates, 10–20% protein, and not more than 35% fat. However, not all of these nutritional recommendations are evidence based. For example, current studies show that the intake of insoluble roughage may be underrepresented. It is also possible that diabetic patients could benefit from keeping to the lower end of the recommended range for carbohydrates (45%) and the upper end of the range advised for protein (20%).  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