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   1282292篇
  免费   98587篇
  国内免费   1998篇
耳鼻咽喉   18544篇
儿科学   44585篇
妇产科学   35113篇
基础医学   182621篇
口腔科学   33692篇
临床医学   111692篇
内科学   258926篇
皮肤病学   28070篇
神经病学   100676篇
特种医学   51336篇
外国民族医学   660篇
外科学   197010篇
综合类   27205篇
现状与发展   1篇
一般理论   377篇
预防医学   96073篇
眼科学   28058篇
药学   95018篇
  2篇
中国医学   2426篇
肿瘤学   70792篇
  2018年   13215篇
  2017年   10029篇
  2016年   10961篇
  2015年   12442篇
  2014年   17251篇
  2013年   26344篇
  2012年   36205篇
  2011年   38245篇
  2010年   22907篇
  2009年   21933篇
  2008年   36829篇
  2007年   39424篇
  2006年   39688篇
  2005年   38594篇
  2004年   37751篇
  2003年   36587篇
  2002年   35943篇
  2001年   64116篇
  2000年   66640篇
  1999年   56525篇
  1998年   15183篇
  1997年   13794篇
  1996年   14251篇
  1995年   13489篇
  1994年   12809篇
  1993年   11827篇
  1992年   44621篇
  1991年   43519篇
  1990年   42277篇
  1989年   40179篇
  1988年   36946篇
  1987年   36284篇
  1986年   33679篇
  1985年   32342篇
  1984年   24190篇
  1983年   20308篇
  1982年   11764篇
  1981年   10721篇
  1980年   9545篇
  1979年   21382篇
  1978年   14859篇
  1977年   12559篇
  1976年   11724篇
  1975年   12660篇
  1974年   14696篇
  1973年   14145篇
  1972年   12967篇
  1971年   11752篇
  1970年   11075篇
  1969年   10041篇
排序方式: 共有10000条查询结果,搜索用时 16 毫秒
61.
OBJECTIVES: To identify and describe current women's thoughts about the menopause, hormone treatment (HT) and perceptions about breast cancer. METHODS: Between December 2004 and January 2005, 4201 postmenopausal women in seven European countries were interviewed via a standardized computer-aided telephone interview protocol. RESULTS: Almost all women reported to have experienced climacteric symptoms, and 63% of the women rated them as being severe. Only 52% of women were aware of the benefits of HT for relief of climacteric symptoms. Although 84% felt that severe symptoms should be treated, only 40% had used HT at some point in time. Thirty-four percent of the women preferring treatment with natural products did so because of the risk of breast cancer associated with HT. HT was recognized by 59% of the women as one of the most important contributors to an increased breast cancer risk. Most women received their information about HT and breast cancer risk from the media. CONCLUSIONS: This European survey reveals that the majority of women experience climacteric symptoms but that their decision whether or not to use HT is highly dependent on their concern about breast cancer risk. An increase in knowledge of the benefits and risks of HT is required for women to make appropriate decisions about hormone use.  相似文献   
62.
63.
Conclusions Limitation of this analysis is participation of limited centers. Though all the regions of the country are represented total number of procedures reported are less. Isolated CABG is commonest procedure performed in 2004. Congenital surgical procedures are more than the valvular heart disease procedure. For appropriate categorization we need standard nomenclature for various congenital surgical procedures.  相似文献   
64.
65.
66.
We report our experience of eight cases of isolated full thickness burns of the penis. Early excision of burns of the penile shaft and repair with a preputial flap or mesh split skin graft produces excellent results, with a reduction in complications and an early re-establishment of sexual function. Conservative treatment of burns of the glans, on the other hand, is appropriate and results in minimal scarring.  相似文献   
67.
The use of additional epidural sympathetic block during and after microvascular surgery in the lower extremities to prevent vasospasm is generally agreed on. However, a significant fall in the perfusion rate of the transplants was seen after application of bupivacaine (Marcain) via the epidural catheter. This effect has, to our knowledge, not been described before and is probably caused by the sympathectomy effect of this type of analgesia.  相似文献   
68.
The present study demonstrates that alcohol-induced memory impairment can be attenuated by pretreatment with an oral tryptophan supplementation. These results provide support for the role of a brain serotonin deficit in this impairment and highlight the impact a dietary manipulation can have on a complex behavioral process.  相似文献   
69.
The Dundee Memory Clinic was established in 1991. This paper reviews the diagnosis of the first 150 attenders and compares the findings with those of other memory clinics.  相似文献   
70.
Macrophage NRAMP1 and its role in resistance to microbial infections   总被引:12,自引:0,他引:12  
  相似文献   
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