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   50114篇
  免费   3484篇
  国内免费   104篇
耳鼻咽喉   386篇
儿科学   1886篇
妇产科学   1777篇
基础医学   5968篇
口腔科学   596篇
临床医学   8785篇
内科学   9101篇
皮肤病学   751篇
神经病学   4532篇
特种医学   878篇
外国民族医学   33篇
外科学   4376篇
综合类   614篇
一般理论   79篇
预防医学   7065篇
眼科学   540篇
药学   2803篇
  1篇
中国医学   89篇
肿瘤学   3442篇
  2023年   299篇
  2022年   431篇
  2021年   980篇
  2020年   658篇
  2019年   1070篇
  2018年   1220篇
  2017年   839篇
  2016年   961篇
  2015年   1038篇
  2014年   1428篇
  2013年   2399篇
  2012年   3422篇
  2011年   3663篇
  2010年   1951篇
  2009年   1829篇
  2008年   3232篇
  2007年   3685篇
  2006年   3544篇
  2005年   3447篇
  2004年   3327篇
  2003年   3167篇
  2002年   2985篇
  2001年   382篇
  2000年   273篇
  1999年   395篇
  1998年   648篇
  1997年   514篇
  1996年   446篇
  1995年   364篇
  1994年   369篇
  1993年   363篇
  1992年   256篇
  1991年   226篇
  1990年   220篇
  1989年   174篇
  1988年   177篇
  1987年   187篇
  1986年   158篇
  1985年   185篇
  1984年   209篇
  1983年   212篇
  1982年   266篇
  1981年   246篇
  1980年   193篇
  1979年   134篇
  1978年   114篇
  1977年   132篇
  1976年   111篇
  1975年   93篇
  1973年   87篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
132.
Mary A. Moxon  MB  ChB  FFARCS    M.E. Ward  MB  BS  FFARCS 《Anaesthesia》1986,41(5):543-546
An operating theatre fire and the steps taken to deal with it are described; the difficulties encountered in evacuating anaesthetised patients are highlighted. Measures which might be taken to prevent recurrence of these problems, and recommendations on the institution of fire drills for the safety of patients and staff are given.  相似文献   
133.
Identification of Alcohol Abuse and Alcoholism with Biological Parameters   总被引:3,自引:0,他引:3  
The prevalence and incidence of heavy alcohol consumption are major problems which have been increasing in many countries in recent years. It is crucial for physicians to consistently identify early drinking problems as well as the various end disease states in order to minimize suffering and maximize recovery. This paper reviews the evolutionary development of clinical tools for detection of alcohol abuse. The focus is primarily on clinical/biochemical indicators of alcohol abuse, emphasizing but not limited to changes in hematological characteristics, liver enzyme activity, lipids, immune function factors, hormones, neurological factors, and some physically based tests. Use of test combinations and sophisticated statistical analysis of pattern changes in test batteries evidence increased diagnostic efficiency.  相似文献   
134.
Twin reversed-arterial-perfusion syndrome (TRAPS) is a rare complication of monochorionic twin pregnancies. TRAPS is characterized by the hemodynamic dependence of a “recipient” twin from a “pump” twin. The “recipient” twin exhibits lethal abnormalities, such as acardia and acephaly. Circulatory failure of the normal twin derives from the existence of arterio-arterial and veno-venous anastomoses within the placenta that allow retrograde perfusion of the acardiac twin by blood coming from the normal twin. Acardiac twinning is the most extreme manifestation of the twin-twin transfusion syndrome. This occurs in 1 in 100 monozygotic twin pregnancies and 1 in 35,000 births. We report a case of diamnionic monochorionic female twins in which the acardiac twin demonstrated severe hydrops fetalis and bilateral talipes varus deformity. Cesarean section was performed on a 27-year-old hypertensive gravida 2, para 1 mother for fetal indications at 32 6/7 weeks gestation. The acardiac fetus had a two-vessel umbilical cord measuring 43.5 cm in length and 0.8 cm in diameter. The proximal end inserted into the root of the normal twin's umbilical cord in an acute angle forming a “v” close to the placental disc. Structures rostral to the thorax were absent except for a round mass of flesh with three small buds in place of the head and neck, and bilateral upper extremities. Only the kidneys, right adrenal, small and large intestine, and rudimentary urinary bladder were present. Both feet demonstrated talipes varus deformity. The fetus was severely hydropic. The subcutaneous fat measured 4.5 cm in maximum thickness. The normal twin had a protracted course complicated with respiratory distress syndrome, moderate secundum atrial septal defect with left to right shunt, and thrombocytopenia of prematurity. The baby was eventually discharged after approximately 1 month. At the time of this report, 5 months postpartum, the neonate is growing and developing normally. To our knowledge, this is the first report of severe hydrops fetalis and talipes varus deformity in an acardiac twin.  相似文献   
135.
136.
More than 700,000 people have a stroke each year in the United States. A diagnosis of stroke formerly elicited a nihilistic approach, but this has substantially changed in the last decade. Currently, time is brain, and it is important for all disciplines to work together to initiate acute stroke protocols in the emergency department and identify patients within the therapeutic time window for thrombolytic and neuroprotective therapies. Evolving protocols, management, and nursing care all have important implications during the acute phase of ischemic stroke. Patient and family education on risk reduction must also be addressed by the entire healthcare team.  相似文献   
137.
138.
139.
140.
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