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   1330231篇
  免费   97372篇
  国内免费   2023篇
耳鼻咽喉   19041篇
儿科学   43915篇
妇产科学   39086篇
基础医学   195193篇
口腔科学   37435篇
临床医学   113335篇
内科学   261123篇
皮肤病学   27849篇
神经病学   105128篇
特种医学   52590篇
外国民族医学   388篇
外科学   205190篇
综合类   26699篇
现状与发展   1篇
一般理论   332篇
预防医学   96268篇
眼科学   30182篇
药学   101636篇
  1篇
中国医学   2572篇
肿瘤学   71662篇
  2018年   13049篇
  2016年   11392篇
  2015年   12734篇
  2014年   17287篇
  2013年   26689篇
  2012年   36493篇
  2011年   39301篇
  2010年   22982篇
  2009年   21204篇
  2008年   38258篇
  2007年   41391篇
  2006年   41716篇
  2005年   40904篇
  2004年   39388篇
  2003年   38395篇
  2002年   37876篇
  2001年   60313篇
  2000年   62342篇
  1999年   52232篇
  1998年   14767篇
  1997年   13261篇
  1996年   13428篇
  1995年   12636篇
  1994年   12063篇
  1993年   11150篇
  1992年   41308篇
  1991年   40650篇
  1990年   40156篇
  1989年   39006篇
  1988年   36358篇
  1987年   35595篇
  1986年   33962篇
  1985年   32431篇
  1984年   24238篇
  1983年   21072篇
  1982年   12621篇
  1981年   11140篇
  1979年   22880篇
  1978年   16048篇
  1977年   13908篇
  1976年   13154篇
  1975年   14387篇
  1974年   16838篇
  1973年   16263篇
  1972年   15443篇
  1971年   14331篇
  1970年   13312篇
  1969年   12846篇
  1968年   12092篇
  1967年   10586篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Molnár  B.  Aroca  S.  Dobos  A.  Orbán  K.  Szabó  J.  Windisch  P.  Stähli  A.  Sculean  A. 《Clinical oral investigations》2022,26(12):7135-7142
Clinical Oral Investigations - To evaluate t he long-term outcomes following treatment of RT 1 multiple adjacent gingival recessions (MAGR) using the modified coronally advanced tunnel (MCAT) with...  相似文献   
2.
Die Anaesthesiologie - Phantomschmerzen haben eine hohe Prävalenz nach Majoramputationen und sind mit einer zusätzlichen Einschränkung der Lebensqualität verbunden....  相似文献   
3.
4.
Intratumor heterogeneity is a main cause of the dismal prognosis of glioblastoma (GBM). Yet, there remains a lack of a uniform assessment of the degree of heterogeneity. With a multiscale approach, we addressed the hypothesis that intratumor heterogeneity exists on different levels comprising traditional regional analyses, but also innovative methods including computer-assisted analysis of tumor morphology combined with epigenomic data. With this aim, 157 biopsies of 37 patients with therapy-naive IDH-wildtype GBM were analyzed regarding the intratumor variance of protein expression of glial marker GFAP, microglia marker Iba1 and proliferation marker Mib1. Hematoxylin and eosin stained slides were evaluated for tumor vascularization. For the estimation of pixel intensity and nuclear profiling, automated analysis was used. Additionally, DNA methylation profiling was conducted separately for the single biopsies. Scoring systems were established to integrate several parameters into one score for the four examined modalities of heterogeneity (regional, cellular, pixel-level and epigenomic). As a result, we could show that heterogeneity was detected in all four modalities. Furthermore, for the regional, cellular and epigenomic level, we confirmed the results of earlier studies stating that a higher degree of heterogeneity is associated with poorer overall survival. To integrate all modalities into one score, we designed a predictor of longer survival, which showed a highly significant separation regarding the OS. In conclusion, multiscale intratumor heterogeneity exists in glioblastoma and its degree has an impact on overall survival. In future studies, the implementation of a broadly feasible heterogeneity index should be considered.  相似文献   
5.
6.
7.
8.
9.
10.
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   
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