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   1097500篇
  免费   73000篇
  国内免费   1594篇
耳鼻咽喉   15405篇
儿科学   34938篇
妇产科学   29107篇
基础医学   156628篇
口腔科学   30159篇
临床医学   96797篇
内科学   207835篇
皮肤病学   24887篇
神经病学   83107篇
特种医学   44354篇
外国民族医学   201篇
外科学   166646篇
综合类   21912篇
现状与发展   1篇
一般理论   273篇
预防医学   75576篇
眼科学   25119篇
药学   88151篇
  8篇
中国医学   3047篇
肿瘤学   67943篇
  2021年   8211篇
  2019年   8360篇
  2018年   11930篇
  2017年   9428篇
  2016年   10710篇
  2015年   12182篇
  2014年   16413篇
  2013年   23476篇
  2012年   32487篇
  2011年   34138篇
  2010年   20112篇
  2009年   18867篇
  2008年   31370篇
  2007年   33411篇
  2006年   33944篇
  2005年   32219篇
  2004年   30763篇
  2003年   29452篇
  2002年   28318篇
  2001年   60423篇
  2000年   61889篇
  1999年   51271篇
  1998年   12600篇
  1997年   11149篇
  1996年   11139篇
  1995年   10427篇
  1994年   9420篇
  1993年   8939篇
  1992年   37928篇
  1991年   36380篇
  1990年   35852篇
  1989年   34380篇
  1988年   30950篇
  1987年   30048篇
  1986年   28275篇
  1985年   26488篇
  1984年   19238篇
  1983年   16151篇
  1982年   8863篇
  1979年   17067篇
  1978年   11433篇
  1977年   10258篇
  1976年   8863篇
  1975年   10098篇
  1974年   11669篇
  1973年   11290篇
  1972年   10770篇
  1971年   10105篇
  1970年   9269篇
  1969年   8949篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
993.
994.
995.
AIMS: To study the time and cost involved in the care of newly registered outpatients with Type 2 diabetes mellitus (DM), compared with patients with hypertension and/or hyperlipidaemia (HTL). METHODS: A total of 313 patients with DM and 58 patients with HTL without diabetes were registered on their first visits to 11 diabetes clinics across Japan. The time and cost involved in their care was recorded over the following 5 months. RESULTS: In the first 3 months, there was an extensive time commitment to both groups. The time spent by physicians was 1.5 times longer for DM than for HTL. The total care time spent by all the care providers for DM was twice that for HTL. The cost of DM care was twice that for HTL, with the cost of medicines excluded. However, half of the cost for DM was for laboratory tests. When these were excluded, and the remaining cost divided by the time spent, the amount for DM was half of that for HTL. Over the 5 months, mean glycated haemoglobin (HbA(1c)) in DM patients improved from 8.0% to 6.5%, and 72% of DM patients achieved the glycaemic target of HbA(1c) < or = 6.5%. CONCLUSIONS: DM care in a diabetes clinic requires a great deal more time and resources than HTL to achieve the best outcome. An educational system for self care, presently lacking in the primary care setting in Japan, would improve glycaemic control for DM patients in the community.  相似文献   
996.
The aqueous extract of the fruits of Terminalia chebula Retz. has been evaluated for its antidiabetic activity in streptozotocin (STZ) induced mild diabetic rats and compared with a known drug, tolbutamide. The oral effective dose (ED) of the extract was observed to be 200 mg/kg body weight, which produced a fall of 55.6% (p<0.01) in the oral glucose tolerance test. Oral administration of ED of aqueous extract of T.chebula (AETC) daily once for two months reduced the elevated blood glucose by 43.2% (p<0.01) and significantly reduced the increase in glycosylated hemoglobin (HbA1c) (p<0.01). The same dose also showed a marked improvement in controlling the elevated blood lipids as well as decreased serum insulin levels in contrast to the untreated diabetic animals. Hepatic and skeletal muscle glycogen content decreased by 75% and 62.9% respectively in diabetic controls, these alterations were partly prevented (34.9% and 21.17%) in AETC treated group when compared to the healthy controls. The in vitro studies with pancreatic islets showed that the insulin release was nearly two times more than that in untreated diabetic animals. The treatment did not have any unfavorable effect on other blood parameters of liver and kidney function tests. LD 50 was found to be above 3 g/kg bw i.e. 15 times of ED, because there were no deaths of animals even at this dose indicating high margin of safety. These findings suggest further investigations for the possible use of the aqueous extract of fruits of T.chebula for the treatment of diabetes.  相似文献   
997.
998.
A report of 500 cases of lumbar anesthesia is submitted with special reference to the incidence of postanesthetic headache, nausea, and vomiting in patients who are ambulatory within a short period after surgery.
1.
1. Postanesthetic headache occurred in 30.6 per cent of the cases; this is a much higher incidence than one finds in most published reports and may be explained upon the basis of the following considerations: cases reported in the literature are not selected cases, but those usually requiring seven to ten days of postoperative bed rest; the cases analyzed in the present study were largely those on whom anorectal operations had been performed, these patients requiring only a short period of recumbency.  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