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   46423篇
  免费   4937篇
  国内免费   112篇
耳鼻咽喉   439篇
儿科学   1214篇
妇产科学   1100篇
基础医学   6956篇
口腔科学   1062篇
临床医学   5747篇
内科学   8496篇
皮肤病学   555篇
神经病学   4463篇
特种医学   1881篇
外国民族医学   57篇
外科学   5937篇
综合类   1020篇
一般理论   43篇
预防医学   5168篇
眼科学   1129篇
药学   3448篇
中国医学   26篇
肿瘤学   2731篇
  2021年   665篇
  2020年   416篇
  2019年   653篇
  2018年   742篇
  2017年   565篇
  2016年   627篇
  2015年   655篇
  2014年   985篇
  2013年   1544篇
  2012年   2037篇
  2011年   2087篇
  2010年   1251篇
  2009年   1093篇
  2008年   1983篇
  2007年   1979篇
  2006年   2004篇
  2005年   1919篇
  2004年   1969篇
  2003年   1736篇
  2002年   1720篇
  2001年   1505篇
  2000年   1619篇
  1999年   1377篇
  1998年   613篇
  1997年   521篇
  1996年   477篇
  1995年   482篇
  1994年   447篇
  1993年   412篇
  1992年   1074篇
  1991年   1115篇
  1990年   1022篇
  1989年   1011篇
  1988年   1012篇
  1987年   879篇
  1986年   873篇
  1985年   843篇
  1984年   702篇
  1983年   585篇
  1982年   387篇
  1981年   359篇
  1980年   349篇
  1979年   663篇
  1978年   520篇
  1977年   439篇
  1976年   414篇
  1975年   384篇
  1974年   439篇
  1973年   435篇
  1972年   377篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
21.
Many older treatments should not be discarded because of newer modalities. Various dermatologic disorders may be controlled effectively by prescribing these older topical agents.  相似文献   
22.
A variety of nutritional factors influence the bioavailability of calcium and increase a woman's risk of osteoporosis. Eight healthy women completed an 8-week metabolic study designed to investigate the effect of nonalcoholic carbonated beverage consumption on calcium metabolism. Compared with women receiving a control diet, women consuming a diet high in nonalcoholic carbonated beverages demonstrated similar mean serum levels of calcium, ionized calcium, phosphorus, alkaline phosphatase, parathyroid hormone, 1,25-dihydroxyvitamin D3, and osteocalcin. Twenty-four-hour urine volume, creatinine clearance, calcium-creatinine ratio, and phosphorus-creatinine ratio were similar during consumption of the diet high in nonalcoholic carbonated beverages and the control diet. Twenty-four-hour cyclic adenosine monophosphate-creatinine ratio was significantly lower in women consuming the diet high in nonalcoholic carbonated beverage compared with women receiving the control diet (342 +/- 27.4 nmol/mmol vs 409 +/- 22.1 nmol/mmol). Consumption of a diet high in nonalcoholic carbonated beverages on a short-term basis does not appear to affect adversely the serum or urinary markers of calcium metabolism.  相似文献   
23.
The assessment of the medical lethality and intent of suicide attempts has been considered an important area of research for those interested in suicide. The current study examined the usefulness of the Risk-Rescue Rating Scale with 109 adolescent suicide attempters and found a restricted range of variability, which, in turn, resulted in poor interrater reliability on a number of items. Results suggest that the Risk-Rescue Rating Scale is of limited usefulness with adolescents, and alternative approaches to assessing lethality and suicidal intent with this age group are discussed.  相似文献   
24.
Diabetic polyneuropathy   总被引:1,自引:0,他引:1  
  相似文献   
25.
26.
Neuro-muscular transmission in the extrinsic muscles of the eye   总被引:5,自引:0,他引:5  
  相似文献   
27.
28.
29.
30.
Little research has examined the care older people receive in the acute surgical setting. Although pain assessment and management are judged to be a priority in nursing, often pain, in older people, is undermanaged for a variety of reasons. Factors such as stoicism, communication and ageism can shape both the patients’ and nurses’ attitude towards the perception of pain which subsequently affects pain management. Through a review of the literature, this paper aims to: (i) identify how healthcare professionals contribute to the assessment and control of postoperative pain in older people and (ii) explore potential barriers to achieving more advantageous pain control in this group. It is suggested that to improve pain management there is a need to individualize pain assessment for older people and to assist clinicians with enhancing their education and decision‐making abilities in this field. This may best be achieved by supporting a programme of change to develop the skills of staff and encouraging learning through reflective practice. There is however a need for further research in this area.  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