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   772篇
  免费   45篇
  国内免费   21篇
耳鼻咽喉   2篇
儿科学   38篇
妇产科学   12篇
基础医学   85篇
口腔科学   36篇
临床医学   66篇
内科学   144篇
皮肤病学   15篇
神经病学   26篇
特种医学   100篇
外科学   109篇
综合类   52篇
预防医学   50篇
眼科学   14篇
药学   58篇
肿瘤学   31篇
  2022年   8篇
  2021年   13篇
  2019年   9篇
  2018年   12篇
  2017年   7篇
  2016年   6篇
  2015年   15篇
  2014年   11篇
  2013年   35篇
  2012年   19篇
  2011年   28篇
  2010年   25篇
  2009年   33篇
  2008年   16篇
  2007年   50篇
  2006年   51篇
  2005年   27篇
  2004年   33篇
  2003年   22篇
  2002年   22篇
  2001年   16篇
  2000年   14篇
  1999年   12篇
  1998年   32篇
  1997年   34篇
  1996年   41篇
  1995年   22篇
  1994年   15篇
  1993年   22篇
  1992年   9篇
  1991年   7篇
  1990年   3篇
  1989年   28篇
  1988年   13篇
  1987年   16篇
  1986年   13篇
  1985年   11篇
  1984年   9篇
  1983年   6篇
  1982年   5篇
  1981年   6篇
  1980年   10篇
  1979年   4篇
  1978年   4篇
  1977年   5篇
  1976年   5篇
  1975年   6篇
  1965年   3篇
  1962年   3篇
  1935年   3篇
排序方式: 共有838条查询结果,搜索用时 15 毫秒
31.
Testicular torsion is a true vascular emergency-prompt diagnosis and surgical management is critical. If treatment is not instigated within 4-6 hours of the onset of pain, irreversible testicular infarction may result, necessitating orchidectomy. This review presents the key features, management principles and medicolegal considerations of this serious condition.  相似文献   
32.
33.
OBJECTIVE; To determine whether anterior prostatic tumours are adequately sampled using the Stamey sextant protocol, as a fifth of prostate cancers are anterior in distribution at radical prostatectomy. MATERIALS AND METHODS: All tumours (62) with an anterior distribution (>or=75% of the tumour anterior to the urethra) on radical prostatectomy whole-mounts, and in which the number and results of the sextant biopsies were available, were extracted from a prostate cancer database. Sixty-one posterior tumours (>or=75% of the malignant tissue posterior to the urethra) and their corresponding sextant biopsies were also retrieved for comparison. The number of biopsy sessions, the number of cores involved and the summated tumour length were recorded, together with the prostate gland weight, the tumour volume and the site of >or=75% of tumour in the superior-inferior axis. RESULTS: Anterior tumours required significantly more biopsy sessions to diagnose prostate cancer than posterior neoplasms (anterior, one set 47; > one set 15; posterior, one set 57; > one set, four, P=0.007). Anterior tumours had fewer cores with tumour involvement and less summated tumour length than had posterior cancers. The mean (sd) number of positive cores was; anterior 1.8 (1.01), posterior 2.50 (1.30) (P=0.001); the summated tumour length was; anterior 5.05 (4.10) mm, posterior 9.25 (7.80) mm (P<0.001). There was no significant difference in gland weight (mean anterior 43.8 g; posterior 48.3 g, P=0.3) or tumour volume (mean anterior 1.85 mL; posterior 1.49 mL, P=0.11) between the groups. There was no significant difference between the incidence of anterior and posterior neoplasms with respect to their position in the superior-inferior axis (P=0.96). CONCLUSIONS: Anterior prostate tumours account for 21% of all prostate cancers. They more often require multiple sets of sextant biopsies for diagnosis, and yield smaller areas of cancer on core biopsies than do posterior tumours in glands of similar weight and tumour volume. If prostate cancer is suspected clinically but biopsies are negative, targeting the anterior gland at subsequent prostatic biopsy should be considered.  相似文献   
34.
Although renal abnormalities have been described in children with Alagille's syndrome, cystic kidney disease has not often been documented, and then usually only at necropsy. Three children with Alagille's syndrome are described, in two of whom a unilateral multicystic dysplastic kidney was detected by prenatal ultrasound; in the other, a solitary cortical cyst was found later in childhood. All have normal renal function, growth, and liver synthetic function but continue to have clinical and biochemical signs of cholestasis. These cases show that unilateral cystic kidney disease with or without renal dysplasia may be associated with Alagille's syndrome, that the clinical course is not necessarily unfavourable, and that Alagille's syndrome should be included in the differential diagnosis of cystic kidney disorders associated with cholestatic liver disease. Patients with Alagille's syndrome should be evaluated by renal ultrasound.  相似文献   
35.
36.
37.
38.
Delirium Tremens     
The varied clinical manifestations and management of 14 male patients with delirium tremens (DT) have been studied. Eight patients were initially hospitalised for diseases unrelated to ethanol abuse i.e. 2 each for gun shot wound, myocardial infarction and stroke, and one each for pneumonia and gastroenteritis. One patient was going through withdrawal because of prodrome of viral hepatitis before he was hospitalised for uncontrolled agitation and delirium. Two known cases of mild essential hypertension on dietary therapy reported for agitation, abnormal behaviour, a single episode of tonic clonic seizure and hypertensive encephalopathy as they could not/did not get alcohol for 3 days. Three patients presented denovo with DT without concomitant illness. The other features besides delirium and hallucinations were tremulousness in 10, tachycardia in 12, fever in 3, diaphoresis in 2 and tonic clonic seizures in 4 patients. The symptoms fluctuated markedly at short intervals and 2 patients did not have any features of sympathetic overactivity. Altered hepatic biochemical parameters and ketonuria with normal blood sugar were noted in 4 and one patients respectively. Other biochemical parameters including serum electrolytes were normal. CT scan brain done for 5 patients revealed subdural haematoma in one. Cerebro spinal fluid (CSF) and EEG findings were noncontributory. All made good recovery with heavy doses of intravenous vitamin B complex, glucose and oral benzodiazepine. Short course of haloperidol was used in 2 patients. Two patients developed pancreatitis during follow up. All patients made complete recovery, and 8 patients have been followed for 8 to 12 months without relapse. The reason for hospitalisation in such cases is often unrelated to alcohol abuse; hence a detailed history of alcoholism is mandatory to identify those at risk as well as for prompt treatment and decreasing the mortality.Key Words: Alcohol withdrawal, Concomitant illnesses, Delirium, Precipitating events  相似文献   
39.
40.
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