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   5045篇
  免费   565篇
  国内免费   13篇
耳鼻咽喉   60篇
儿科学   221篇
妇产科学   90篇
基础医学   849篇
口腔科学   119篇
临床医学   594篇
内科学   849篇
皮肤病学   55篇
神经病学   418篇
特种医学   143篇
外科学   743篇
综合类   88篇
一般理论   2篇
预防医学   532篇
眼科学   111篇
药学   282篇
中国医学   4篇
肿瘤学   463篇
  2023年   37篇
  2022年   38篇
  2021年   106篇
  2020年   65篇
  2019年   99篇
  2018年   126篇
  2017年   78篇
  2016年   89篇
  2015年   127篇
  2014年   141篇
  2013年   188篇
  2012年   291篇
  2011年   306篇
  2010年   132篇
  2009年   113篇
  2008年   230篇
  2007年   255篇
  2006年   244篇
  2005年   210篇
  2004年   191篇
  2003年   186篇
  2002年   191篇
  2001年   117篇
  2000年   146篇
  1999年   126篇
  1998年   55篇
  1997年   59篇
  1996年   42篇
  1995年   51篇
  1994年   34篇
  1993年   41篇
  1992年   106篇
  1991年   112篇
  1990年   88篇
  1989年   109篇
  1988年   94篇
  1987年   88篇
  1986年   84篇
  1985年   77篇
  1984年   47篇
  1983年   56篇
  1982年   57篇
  1981年   36篇
  1979年   55篇
  1978年   35篇
  1976年   48篇
  1975年   41篇
  1974年   42篇
  1973年   44篇
  1972年   34篇
排序方式: 共有5623条查询结果,搜索用时 31 毫秒
1.
2.
3.
Nursing diagnosis as a critical component of the nursing process provides a common taxonomy to describe problems that nurses can treat and is a convenient, logical way to reference nursing standards. Theory is translated into practice with the use of population-specific prototype care guides and a written orders system. Nurses in leadership are responsible for providing the necessary resources to promote professional growth and facilitate desired change. Recommendations to assist with the implementation of nursing diagnosis are identified in Table 1. The system is dependent on staff nurses' professional commitment to learning and willingness to actively participate in change. Involvement of staff nurses continues to be a critical factor in the improvement of nursing practice.  相似文献   
4.
5.
Physicians have long been wary of chronically administering neuroleptic drugs to the demented elderly for fear of significant side effects. In this article, the authors present evidence to support these fears. A discussion of the early and late emerging side effects of neuroleptic drugs is presented.  相似文献   
6.
This paper reports the results of an experimental study modeled after a study conducted by Kaplan et al. The hypothesis tested was: Adolescents who receive a social learning intervention (SLI) will show greater improvement in metabolic control of their diabetes than will adolescents who receive only traditional diabetes instruction. Thirty-four adolescents between the ages of 12 and 16 who attended a midwestern camp were randomly divided into two groups. Both groups attended a daily 1-hour teaching session about diabetes. Later each day, the experimental group received an SLI consisting of role modeling to help the subjects circumvent peer pressure. To determine metabolic control, HbA1 values were determined before and 3 1/2 months after the intervention. The control group showed no significant difference in HbA1 values, while the experimental group showed a decrease in metabolic control.  相似文献   
7.
8.
Immunity against the opportunistic fungal pathogen Pneumocystis.   总被引:2,自引:0,他引:2  
Species of the genus Pneumocystis exist as opportunistic fungal pathogens and are associated with severe pneumonia and pulmonary complications in immunocompromised individuals. Although prophylactic therapy for Pneumocystis has significantly decreased the overall incidence of infection, more than 80% of cases in current patient populations are considered breakthrough cases. In the HIV-infected population, in the years following the initiation of highly active antiretroviral therapy (HAART), significant reductions in the incidence of Pneumocystis infection were observed, although trends over the last several years suggest that the incidence of Pneumocystis has plateaued rather than decreased. Furthermore, with the more prominent usage of immunosuppressive therapies, the frequency of Pneumocystis infection in the HIV-negative population, such as those with hematologic malignancies and those who have undergone transplantation, has risen significantly. Investigating host defense mechanisms against P. carinii has historically been problematic due to the difficulty in achieving continuous in vitro propagation of proliferating Pneumocytis organisms. Nevertheless, clinical and experimental studies have documented that host defense against Pneumocystis involves a concerted effort between innate, cell-mediated (T lymphocyte) and humoral (B lymphocyte) responses. However, the pulmonary environment is a tissue site where heightened inflammatory responses can often lead to inflammation-mediated injury, thereby contributing to the pathogenesis of Pneumocystis infection. Accordingly, clearance of Pneumocystis from the pulmonary environment is dependent on a delicate equilibrium between the inflammatory response and immune-mediated clearance of the organism. Furthermore, innate and adaptive responses against Pneumocystis are strikingly similar to those against other medically-important fungi, thus providing additional evidence that Pneumocystis exists as a fungal organism.  相似文献   
9.
10.
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