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   1600283篇
  免费   133478篇
  国内免费   2584篇
耳鼻咽喉   21646篇
儿科学   52943篇
妇产科学   46267篇
基础医学   227855篇
口腔科学   47293篇
临床医学   140942篇
内科学   314875篇
皮肤病学   34101篇
神经病学   130185篇
特种医学   64729篇
外国民族医学   474篇
外科学   243816篇
综合类   39721篇
现状与发展   3篇
一般理论   544篇
预防医学   122877篇
眼科学   36474篇
药学   121275篇
  3篇
中国医学   2974篇
肿瘤学   87348篇
  2018年   14777篇
  2016年   12905篇
  2015年   15033篇
  2014年   20653篇
  2013年   31370篇
  2012年   42562篇
  2011年   44768篇
  2010年   26346篇
  2009年   25317篇
  2008年   43025篇
  2007年   45281篇
  2006年   46079篇
  2005年   44711篇
  2004年   44108篇
  2003年   42219篇
  2002年   41330篇
  2001年   75699篇
  2000年   78351篇
  1999年   66409篇
  1998年   17738篇
  1997年   16344篇
  1996年   16322篇
  1995年   16026篇
  1994年   15076篇
  1993年   14218篇
  1992年   55442篇
  1991年   53791篇
  1990年   52571篇
  1989年   50844篇
  1988年   47232篇
  1987年   46571篇
  1986年   44292篇
  1985年   42850篇
  1984年   32041篇
  1983年   27573篇
  1982年   16150篇
  1981年   14438篇
  1980年   13566篇
  1979年   30461篇
  1978年   21066篇
  1977年   17764篇
  1976年   16694篇
  1975年   17576篇
  1974年   21487篇
  1973年   20673篇
  1972年   18861篇
  1971年   17776篇
  1970年   16291篇
  1969年   15270篇
  1968年   13952篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
121.
Journal of Behavioral Medicine - Understanding associations between mothers’ and children’s physical activity and sedentary behavior on more fine-grained timescales can provide insights...  相似文献   
122.
123.
124.
The aim of this study was to analyse the effect of body mass index (BMI), both low and high values, on the perioperative complication rate in patients with oral squamous cell carcinoma (OSCC). The medical records of 259 patients operated between 2014 and 2017 for OSCC were reviewed. Univariate and multivariate analyses were performed. Sixty of the 259 patients developed 87 complications. Low or high BMI was not associated with the perioperative complication rate. A longer operating time and increased blood loss were associated with a higher perioperative complication rate and higher Clavien–Dindo grade. Low BMI, American Society of Anesthesiologists score 2 and 3, a longer operating time, and increased blood loss were associated with a longer hospital stay. Low BMI was associated with a longer hospital stay. Neither low nor high BMI was associated with the perioperative complication rate. A longer operating time and increased blood loss were associated with a higher perioperative complication rate and higher Clavien–Dindo grade.  相似文献   
125.
126.
Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz - Gefahrstoffe sind in der Arbeitswelt allgegenwärtig. Beschäftigte aus allen Branchen sind bei ihrer Arbeit mit...  相似文献   
127.
128.
We report a case of disseminated Trichosporon asahii in a patient on systemic antifungal therapy who presented with multiple cutaneous nodules suggestive of fungal infection. Histologic features resembled neutrophilic eccrine hidradenitis but staining with periodic acid‐Schiff and Gomori methenamine silver confirmed the clinical diagnosis. This case highlights the importance of maintaining suspicion for trichosporonosis and contextualizing histologic findings within the underlying clinical picture.  相似文献   
129.
130.
ABSTRACT

A qualitative grounded theory approach was used to analyze 34 narratives from young men about their experience of retaining, losing, or giving away their virginity, where 7 said they were virgins, 26 said they were non-virgins, and one did not mention his virginity status. We found that virginity is a multidimensional concept, with two distinct dimensions: the experiential and the developmental. The experiential dimension refers to young men's perception and understanding of their virginity in four overlapping areas: physical, spiritual, relational, and emotional. The developmental dimension refers to young men's perception of their underlying sexual identity growth processes and the gendered and sexual double standards that influence this understanding. Clinical implications of this study are useful in education and counseling. They seek to empower young men with information relating to the multidimensional nature of virginity experience, and minimize the negative effects on romantic relationships, sexual adjustment, and self-identity development. The findings are helpful in designing interventions for young men and women who are at high risk for sexually transmitted infections and can help them negotiate mutually safe and pleasurable experiences regarding their virginity.  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