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   1288231篇
  免费   95792篇
  国内免费   2006篇
耳鼻咽喉   18269篇
儿科学   42869篇
妇产科学   38092篇
基础医学   188949篇
口腔科学   35730篇
临床医学   109601篇
内科学   254287篇
皮肤病学   26598篇
神经病学   100121篇
特种医学   50468篇
外国民族医学   366篇
外科学   199481篇
综合类   26872篇
现状与发展   1篇
一般理论   315篇
预防医学   93999篇
眼科学   29206篇
药学   98879篇
  1篇
中国医学   2501篇
肿瘤学   69424篇
  2018年   12006篇
  2015年   11780篇
  2014年   16276篇
  2013年   24742篇
  2012年   34079篇
  2011年   36505篇
  2010年   21512篇
  2009年   20318篇
  2008年   35521篇
  2007年   38560篇
  2006年   39081篇
  2005年   38371篇
  2004年   36950篇
  2003年   35928篇
  2002年   35491篇
  2001年   58538篇
  2000年   60063篇
  1999年   51100篇
  1998年   14437篇
  1997年   12965篇
  1996年   13254篇
  1995年   12497篇
  1994年   11918篇
  1993年   11011篇
  1992年   41309篇
  1991年   40666篇
  1990年   40176篇
  1989年   38975篇
  1988年   36376篇
  1987年   35577篇
  1986年   33972篇
  1985年   32372篇
  1984年   24126篇
  1983年   20962篇
  1982年   12499篇
  1981年   11066篇
  1980年   10304篇
  1979年   22809篇
  1978年   16006篇
  1977年   13877篇
  1976年   13076篇
  1975年   14329篇
  1974年   16844篇
  1973年   16227篇
  1972年   15415篇
  1971年   14322篇
  1970年   13313篇
  1969年   12813篇
  1968年   12047篇
  1967年   10532篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Vaccination is a vital health care initiative to prevent individual and population infection. To increase vaccination rates the federal government implemented the ‘No Jab, No Pay’ policy, where eligibility for several government benefits required children to be fully vaccinated by removing ‘conscientious objections’ and expanding the age range of children whose families receive benefits. This study assesses the impact of this policy at a local area within a single medical practice community in NSW, Australia. A retrospective clinical audit was performed between 2012 and 2017 on a single general practice's vaccination records for children ≤19 years. Catch-up vaccinations were assessed based on age at vaccination. Incidence of catch-up vaccinations was assessed for each of four years before and two years after the implementation of the ‘No Jab, No Pay’ policy in January 2016, along with the age of children and vaccination(s) given. Catch-up vaccinations were assessed temporally either side of implementation of ‘No Jab, No Pay’. Comparing the average annual vaccination catch-up incidence rate of 6.2% pre-implementation (2012–2015), there was an increase to 9.2% in 2016 (p < .001) and 7.8% in 2017 (p = .027). Secondary outcome measurement of catch-up vaccination incidence rates before (2012–2015) and after (2016–2017) ‘No Jab, No Pay’ implementation showed statistically significant increases for children aged 8–11 years (3.2%–5.6%, p = .038), 12–15 years (7.5%–14.7%, p < .001) and 16–19 years (3.3%–10.2%, p < .001) along with a statistically significant reduction in children aged 1–3 years (11.4%–6.2%, p = .015). Also, catch-up rates for DTPa significantly increased after program implementation. This study demonstrates that the Australian federal government vaccination policy ‘No Jab, No Pay’ was coincident with an increase in catch-up vaccinations within a rural NSW community served by one medical practice, especially for older children.  相似文献   
5.
6.
7.
To determine percent of patients without malignancy and ≤ 40 years of age with high cumulative radiation doses through recurrent CT exams and assess imaging appropriateness. From the cohort of patients who received cumulative effective dose (CED) of ≥ 100 mSv over a 5-year period, a sub-set was identified with non-malignant disease. The top 50 clinical indications leading to multiple CTs were determined. Clinical decision support (CDS) system scores were analyzed using a widely adopted standard of 1–3 (red) as “not usually appropriate,” 4–6 (yellow) “may or may not be appropriate,” and 7–9 (green) “usually appropriate.” Clinicians reviewed patient records to assess compliance with appropriate use criteria (AUC). 9.6% of patients in our series were with non-malignant conditions and 1.4% with age ≤ 40 years. CDS scores (rounded) were 2% red, 38% yellow, 27% green, and 33% unscored CTs. Clinical society guidelines for CT exams, wherever available, were followed in 87.5 to 100% of cases. AUCs were not available for several clinical indications as also referral guidelines for serial CT imaging. More than half of CT exams were unrelated to follow-up of a primary chronic disease. We are faced with a situation wherein patients in age ≤ 40 years require or are thought to require many CT exams over the course of a few years but the radiation risk creates concern. There is a fair number of conditions for which AUC are not available. Suggested solutions include development of CT scanners with lesser radiation dose and further development of appropriateness criteria.  相似文献   
8.
9.
10.
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