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   10302篇
  免费   1098篇
  国内免费   170篇
耳鼻咽喉   115篇
儿科学   333篇
妇产科学   321篇
基础医学   654篇
口腔科学   167篇
临床医学   1851篇
内科学   2029篇
皮肤病学   230篇
神经病学   834篇
特种医学   463篇
外国民族医学   1篇
外科学   2389篇
综合类   93篇
预防医学   653篇
眼科学   400篇
药学   490篇
中国医学   1篇
肿瘤学   546篇
  2023年   119篇
  2021年   126篇
  2020年   132篇
  2019年   130篇
  2018年   208篇
  2017年   226篇
  2016年   238篇
  2015年   212篇
  2014年   325篇
  2013年   438篇
  2012年   286篇
  2011年   333篇
  2010年   334篇
  2009年   440篇
  2008年   341篇
  2007年   246篇
  2006年   295篇
  2005年   269篇
  2004年   214篇
  2003年   220篇
  2002年   212篇
  2001年   264篇
  2000年   243篇
  1999年   297篇
  1998年   252篇
  1997年   254篇
  1996年   350篇
  1995年   310篇
  1994年   240篇
  1993年   170篇
  1992年   255篇
  1991年   264篇
  1990年   164篇
  1989年   237篇
  1988年   215篇
  1987年   181篇
  1986年   200篇
  1985年   185篇
  1984年   173篇
  1983年   130篇
  1982年   125篇
  1981年   109篇
  1980年   120篇
  1979年   101篇
  1978年   111篇
  1977年   91篇
  1976年   76篇
  1975年   80篇
  1972年   76篇
  1971年   78篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
5.
6.
BACKGROUND: Abnormalities in calcium and vitamin D metabolism have been reported after bariatric surgery. The purpose of this study was to evaluate vitamin D nutritional status among morbidly obese patients before gastric bypass surgery. METHODS: We prospectively studied 279 morbidly obese patients seeking gastric bypass surgery for vitamin D nutritional status as assessed by serum 25-hydroxyvitamin D level. In addition, serum samples were analyzed for calcium, alkaline phosphatase (AP), intact parathyroid hormone (PTH), and 1,25-dihydroxyvitamin D. RESULTS: Mean patient age was 43 +/- 9 years; 87% of the study patients were women, and 72% were white. Serum calcium and AP levels were normal in 88% and 89% of the patients, respectively. Vitamin D depletion, defined as serum 25-hydroxyvitamin D level 相似文献   
7.
8.
A technique is described for recording the electromyographic response of the striated urethral sphincter to transcutaneous magnetic stimulation of the brain and spinal cord. A series of 11 control patients have been studied and 3 examples of patients with neurological disease also are reported. The most reliable response was recorded after facilitated transcranial stimulation of the cerebral cortex, with the mean latency of the electromyographic response in the striated sphincter being 26.4 msec. (standard deviation 2.21). It is concluded that assessment of the latency of the striated urethral sphincter electromyographic response to transcranial magnetic stimulation may be a useful technique in the investigation of patients with disorders of micturition.  相似文献   
9.
Metabolic syndrome is associated with increased risk for cardiovascular and cerebrovascular disease. The World Health Organization and National Cholesterol Education Program Adult Treatment Panel III have identified physiologic abnormalities associated with metabolic syndrome, including impaired glucose metabolism, high blood pressure, elevated cholesterol levels, and abdominal obesity. It is estimated that 47 million Americans have metabolic syndrome. A variety of therapies may help reduce the incidence and risk, including diet, weight loss, physical exercise, glycemic control, and pharmacological treatments. Nursing care is focused on developing an individualized plan of care that includes family members and providing education, psychosocial support, close monitoring, and continued follow-up to ensure adherence and success in achieving patient outcomes.  相似文献   
10.
OBJECTIVE: This study was designed to investigate potential areas of practice for the clinical laboratory scientist (CLS) and to propose a graduate curriculum to prepare the practitioner for an advanced level of practice. DESIGN: Meta-analysis of PharmD, physician assistant, physical therapy, and nurse practitioner curricula focusing on academic and clinical advanced practice was used to develop an educational model and curriculum for a professional doctorate in clinical laboratory science (CLS). MAIN OUTCOME MEASURE: (1) New educational model for CLS advanced practice; (2) A proposed curriculum for a Doctorate of Clinical Laboratory Science degree. RESULTS: A new curriculum model was adapted from established healthcare educational models. CONCLUSION: Although there is a need for a baccalaureate degree in CLS there is also a role for expanded education and responsibilities for CLS practitioners. The CLS Advanced Practitioner design focuses on moving students from the baccalaureate level to the doctoral level and prepares the individual to become an integral part of the healthcare team.  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