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   1363篇
  免费   106篇
  国内免费   2篇
耳鼻咽喉   10篇
儿科学   139篇
妇产科学   79篇
基础医学   209篇
口腔科学   34篇
临床医学   91篇
内科学   216篇
皮肤病学   11篇
神经病学   162篇
特种医学   19篇
外科学   140篇
综合类   26篇
一般理论   2篇
预防医学   107篇
眼科学   10篇
药学   77篇
中国医学   1篇
肿瘤学   138篇
  2023年   18篇
  2022年   26篇
  2021年   41篇
  2020年   15篇
  2019年   24篇
  2018年   27篇
  2017年   23篇
  2016年   28篇
  2015年   31篇
  2014年   37篇
  2013年   43篇
  2012年   72篇
  2011年   62篇
  2010年   43篇
  2009年   49篇
  2008年   67篇
  2007年   87篇
  2006年   72篇
  2005年   55篇
  2004年   50篇
  2003年   55篇
  2002年   45篇
  2001年   29篇
  2000年   46篇
  1999年   28篇
  1998年   17篇
  1997年   7篇
  1996年   13篇
  1995年   17篇
  1994年   11篇
  1993年   18篇
  1992年   36篇
  1991年   23篇
  1990年   26篇
  1989年   22篇
  1988年   21篇
  1987年   22篇
  1986年   17篇
  1985年   20篇
  1984年   15篇
  1983年   15篇
  1982年   11篇
  1981年   5篇
  1979年   7篇
  1976年   5篇
  1975年   5篇
  1974年   4篇
  1973年   5篇
  1967年   8篇
  1966年   5篇
排序方式: 共有1471条查询结果,搜索用时 15 毫秒
101.
102.
103.
A review of 46 perinatal deaths was conducted using a 1982 to 1985 regional perinatal network database of 6701 delivered postdate (greater than or equal to 42 weeks gestation) infants. Perinatal mortality (6.9 per 1000 births) increased as gestational age advanced beyond 42 weeks, and was higher in young teenagers or mothers with some additional antenatal complications, such as hypertension. Meconium staining of the amniotic fluid, low Apgar scores, low birthweight, congenital malformations, and neonatal complications, including pneumothorax, meconium aspiration, and seizures, were associated with perinatal death.  相似文献   
104.
For many years, industry has utilized the concept of human error rates to monitor and minimize human errors in the production process. A consistent quality-controlled product increases consumer satisfaction and repeat purchase of product. Administrative dietitians have applied the concepts of using human error rates (the number of errors divided by the number of opportunities for error) at four hospitals, with a total bed capacity of 788, within a tertiary-care medical center. Human error rate was used to monitor and evaluate trayline employee performance and to evaluate layout and tasks of trayline stations, in addition to evaluating employees in patient service areas. Long-term employees initially opposed the error rate system with some hostility and resentment, while newer employees accepted the system. All employees now believe that the constant feedback given by supervisors enhances their self-esteem and productivity. Employee error rates are monitored daily and are used to counsel employees when necessary; they are also utilized during annual performance evaluation. Average daily error rates for a facility staffed by new employees decreased from 7% to an acceptable 3%. In a facility staffed by long-term employees, the error rate increased, reflecting improper error documentation. Patient satisfaction surveys reveal satisfaction, for tray accuracy increased from 88% to 92% in the facility staffed by long-term employees and has remained above the 90% standard in the facility staffed by new employees.  相似文献   
105.
106.
Members of the Collaborative Immunization Initiatives determined the immunization coverage rates for two groups of children in our clinic: those 7 to 12 months old and those 18 to 23 months old. The Clinic Assessment Software Application from the Centers for Disease Control and Prevention was used. The immunization rates determined by this method appeared to significantly underestimate the vaccination coverage rates in our clinic. A review of available charts included in the original sample was done excluding patients no longer attending our clinic. We found a higher rate of coverage in the same sample and a low rate of missed opportunities for administering immunizations. The major reason for this discrepancy is overly stringent Clinic Assessment Software Application inclusion criteria. Additional factors include failure to take into account the wide range of acceptable ages for administering immunizations and different dosages for different brands of vaccines. Different methods of calculation may cause as much as a 20% difference in immunization rates for the same or similar population groups. Such large differences may lead to vastly different responses and interventions. We believe that a central registry is the most accurate method of determining immunization rates. Until this is widely available and applied, a more accurate measure of a facility’s immunization effectiveness is the number of missed opportunities for administering immunizations.  相似文献   
107.
Breast cancers in women 35 years of age and younger: mammographic findings   总被引:6,自引:0,他引:6  
During an 8-year period, 74 breast cancers were diagnosed in 66 patients 35 years of age and younger who underwent preoperative mammography. Mammograms and clinical data in these women were reviewed retrospectively to evaluate the mammographic findings and the efficacy of mammography. In 58 cases the cancer was detected by means of both clinical examination and mammography; in eight cases, mammography alone enabled readers to find the lesion; in seven cases, the lesion was found by means of clinical examination, but mammograms were negative; and in one case a cancer was found by means of incidental biopsy of the contralateral breast. Although 34 patients (52%) had dense breasts, mammography demonstrated the lesion in 66 cases (89%); the most common mammographic finding was microcalcifications, with or without associated masses (n = 28 [38%]). The authors do not suggest that screening of women younger than 35 years be performed routinely, but they believe that mammography can be valuable in screening young women at high risk for breast cancer or in confirming and suggesting prompt biopsy of a suspicious lesion.  相似文献   
108.
109.
110.
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