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   2438913篇
  免费   200370篇
  国内免费   4342篇
耳鼻咽喉   35113篇
儿科学   74774篇
妇产科学   64487篇
基础医学   343392篇
口腔科学   68756篇
临床医学   225503篇
内科学   479109篇
皮肤病学   48823篇
神经病学   206027篇
特种医学   97730篇
外国民族医学   895篇
外科学   368033篇
综合类   57368篇
现状与发展   1篇
一般理论   1061篇
预防医学   199060篇
眼科学   56747篇
药学   182418篇
  6篇
中国医学   4408篇
肿瘤学   129914篇
  2018年   25541篇
  2017年   19764篇
  2016年   21636篇
  2015年   24417篇
  2014年   35066篇
  2013年   53315篇
  2012年   72036篇
  2011年   75793篇
  2010年   44399篇
  2009年   42689篇
  2008年   71828篇
  2007年   76650篇
  2006年   77316篇
  2005年   75312篇
  2004年   72508篇
  2003年   69944篇
  2002年   69049篇
  2001年   113748篇
  2000年   117865篇
  1999年   99578篇
  1998年   28715篇
  1997年   26172篇
  1996年   26077篇
  1995年   25177篇
  1994年   23735篇
  1993年   22060篇
  1992年   80410篇
  1991年   77406篇
  1990年   74521篇
  1989年   71772篇
  1988年   66706篇
  1987年   65689篇
  1986年   62167篇
  1985年   59285篇
  1984年   44970篇
  1983年   38318篇
  1982年   23376篇
  1981年   20770篇
  1980年   19463篇
  1979年   41930篇
  1978年   29480篇
  1977年   24786篇
  1976年   23271篇
  1975年   24369篇
  1974年   30126篇
  1973年   28453篇
  1972年   26673篇
  1971年   24534篇
  1970年   23094篇
  1969年   21414篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Reports on individual nonbehavioral child and adolescent psychotherapy since 1963 are reviewed. Inclusion criteria required some minimal contrasting group. Forty-three studies were assessed for basic methodological adequacy and main findings. The authors conclude that summary impressions from this body of literature cannot be made due to the magnitude of the flaws in basic psychotherapy research methodology. Suggestions are made regarding the future of child and adolescent psychotherapy research.  相似文献   
992.
993.
994.
Computer tomography (CT) of the brain is of value for finding potentially correctable lesions in adult patients with new onset seizures. The value of CT is unknown, however, for finding such lesions in adult chronic epileptic patients without prior CT. We compared a group of 177 adult patients who had CT within a year from the onset of seizures to a group of 93 patients who had a history of seizures for more than a year before CT was performed. In the first group, 33 potentially correctable lesions (19%) were found including 17 tumors. The group with chronic epilepsy had 4 (4%) potentially correctable lesions: 3 arteriovenous malformations and 1 meningioma. It seems that CT is of value in discovering potentially removable lesions in chronic epileptic patients, but the likelihood is relatively small. The incidence of stable structural lesions seems to be similar in the two groups.  相似文献   
995.
Forty-two therapists conducting individual psychotherapy with schizophrenic outpatients in a public mental health system responded to a questionnaire that focused on the types of interventions used and the issues and problems encountered in therapy. The therapists spent 59 percent of their time in supportive, problem-solving work and only 32 percent in traditional psychotherapeutic interventions, such as providing insight. The most common issues in therapy were relationship problems, family concerns, depression, losses, and the role of medications in the client's life. The most significant impediments to therapeutic work were the lack of community resources, the client's noncompliance with medications and lack of motivation, and dual diagnoses. Suggestions are offered for improving psychotherapy with schizophrenic outpatients in the public mental health system.  相似文献   
996.
997.
998.
BACKGROUND. Studies have documented the potential contributions of preventive health care programs. Yet little is known about which screening tests should be included in public health programs for older persons. This study offers recommendations regarding these tests. METHODS. The recommendations come from synthesizing the findings of the US Preventive Services Task Force, the literature, and the consensus of experts in geriatrics, gerontology, and health policy research. The literature was evaluated to identify methodologically sound studies of the prevalence of selected disorders and benefits and availability of screening procedures for those disorders. Experts from various fields specializing in the care of the elderly formed panels to assist in evaluating the literature and providing further information from gerontological and public health perspectives. RESULTS. We recommend vision testing for refractive error; inspection of the skin surface for fungal infection and skin cancer, drug eruptions, and xerosis; a history for symptoms of xerosis; audiometric testing for presbycusis; surveys for hearing loss; otoscopic inspection for cerumen impaction; dental examination for caries; measurement of blood pressure for hypertension; and breast examination and mammography for cancer. CONCLUSIONS. Our study suggests that these screening procedures are useful for public health screening programs. More information is needed on the effects of screening services on the health and functioning of older persons.  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