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   1812016篇
  免费   136585篇
  国内免费   19404篇
耳鼻咽喉   24734篇
儿科学   53179篇
妇产科学   46307篇
基础医学   251444篇
口腔科学   47638篇
临床医学   166806篇
内科学   354901篇
皮肤病学   37351篇
神经病学   135223篇
特种医学   70923篇
外国民族医学   854篇
外科学   269314篇
综合类   69894篇
现状与发展   57篇
一般理论   441篇
预防医学   123007篇
眼科学   42547篇
药学   143618篇
  197篇
中国医学   16586篇
肿瘤学   112984篇
  2021年   21437篇
  2020年   14878篇
  2019年   18664篇
  2018年   24489篇
  2017年   19530篇
  2016年   20113篇
  2015年   25508篇
  2014年   33915篇
  2013年   42501篇
  2012年   59564篇
  2011年   63610篇
  2010年   38005篇
  2009年   34470篇
  2008年   54924篇
  2007年   58165篇
  2006年   58590篇
  2005年   56880篇
  2004年   51476篇
  2003年   49835篇
  2002年   47765篇
  2001年   91708篇
  2000年   95367篇
  1999年   81624篇
  1998年   22844篇
  1997年   20656篇
  1996年   20022篇
  1995年   18846篇
  1994年   17405篇
  1993年   15483篇
  1992年   60032篇
  1991年   57693篇
  1990年   55626篇
  1989年   53366篇
  1988年   48824篇
  1987年   47631篇
  1986年   44114篇
  1985年   41919篇
  1984年   30522篇
  1983年   25456篇
  1982年   14207篇
  1979年   26400篇
  1978年   17891篇
  1977年   15274篇
  1976年   13714篇
  1975年   15074篇
  1974年   17506篇
  1973年   16777篇
  1972年   15581篇
  1971年   14291篇
  1970年   13404篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
81.
The objective of this study is to assess the efficacy and safety of herbal medicines (HMs), as a monotherapy or adjunct therapy, compared to placebo or conventional approaches in the treatment of idiopathic Parkinson's disease (PD). We conducted a systematic review of randomized controlled trials from both conventional and alternative medicine sources. Outcome measures were overall improvement, quality of life, reduction of levodopa dose, and adverse events. Nine studies were included, each testing a different HM. Six of the trials had limited internal validity due to major flaws in design, including the lack of proper randomization; insufficient blinding; unclear inclusive criteria in terms of diagnostic criteria, baseline staging, and duration of disease; lack of proper sample size calculation; and insufficient data analysis. Imbalances in gender and ethnicity among the patients in the included trials were observed. No major adverse events emerged, and no specific pattern was detected from the trials describing such data. In addition to major methodological defects, heterogeneity in (1) HM tested, (2) control treatment, and (3) outcome measure hindered in-depth data analysis and synthesis. Current evidence is insufficient to evaluate the efficacy and safety of various HMs. Further studies with improved trial design and reporting, with assessment on cost-effectiveness, quality of life, and qualitative data are warranted.  相似文献   
82.
83.
84.
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   
85.
86.
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   
87.
88.
89.
90.
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   
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