全文获取类型
收费全文 | 13323篇 |
免费 | 908篇 |
国内免费 | 266篇 |
专业分类
耳鼻咽喉 | 1536篇 |
儿科学 | 278篇 |
妇产科学 | 188篇 |
基础医学 | 856篇 |
口腔科学 | 340篇 |
临床医学 | 2203篇 |
内科学 | 1139篇 |
皮肤病学 | 101篇 |
神经病学 | 472篇 |
特种医学 | 1077篇 |
外科学 | 1107篇 |
综合类 | 1631篇 |
现状与发展 | 2篇 |
一般理论 | 4篇 |
预防医学 | 1385篇 |
眼科学 | 113篇 |
药学 | 1136篇 |
10篇 | |
中国医学 | 615篇 |
肿瘤学 | 304篇 |
出版年
2024年 | 37篇 |
2023年 | 212篇 |
2022年 | 413篇 |
2021年 | 723篇 |
2020年 | 573篇 |
2019年 | 534篇 |
2018年 | 508篇 |
2017年 | 473篇 |
2016年 | 557篇 |
2015年 | 499篇 |
2014年 | 996篇 |
2013年 | 1008篇 |
2012年 | 832篇 |
2011年 | 832篇 |
2010年 | 719篇 |
2009年 | 665篇 |
2008年 | 612篇 |
2007年 | 625篇 |
2006年 | 563篇 |
2005年 | 421篇 |
2004年 | 356篇 |
2003年 | 312篇 |
2002年 | 247篇 |
2001年 | 245篇 |
2000年 | 196篇 |
1999年 | 174篇 |
1998年 | 131篇 |
1997年 | 122篇 |
1996年 | 97篇 |
1995年 | 75篇 |
1994年 | 114篇 |
1993年 | 58篇 |
1992年 | 69篇 |
1991年 | 42篇 |
1990年 | 58篇 |
1989年 | 43篇 |
1988年 | 44篇 |
1987年 | 33篇 |
1986年 | 30篇 |
1985年 | 45篇 |
1984年 | 43篇 |
1983年 | 26篇 |
1982年 | 41篇 |
1981年 | 18篇 |
1980年 | 16篇 |
1979年 | 13篇 |
1978年 | 21篇 |
1977年 | 7篇 |
1976年 | 6篇 |
1975年 | 7篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
《International journal of oral and maxillofacial surgery》2022,51(3):332-337
The purpose of this study was to investigate the association between habitual snoring (HS), middle ear disease (MED), and speech problems in children with cleft palate. This cross-sectional study included children aged 2.0–7.9 years with non-syndromic cleft palate anomalies. Parents completed the Pediatric Sleep Questionnaire and a questionnaire about MED. Audiograms and speech assessment were also conducted. Ninety-five children were enrolled; 15.2% of families reported HS, 97.6% MED, and 17.1% speech problems. HS (37.5% vs 10.3%, P = 0.007) and early episodes of MED (92.3% vs 58.2%, P = 0.021) were more likely to be reported for children with isolated cleft palate when compared to those with cleft lip and palate. Children with cleft lip and palate had a higher frequency of MED with effusion compared to those with Robin sequence (86.4% vs 57.1%, P = 0.049). The odds ratio for HS in children with ≥1 episode of MED in the last year was 7.37 (95% confidence interval 1.55–35.15, P = 0.012). There was a trend for children with speech problems reported by parents to have HS (30.8% vs 11.5%, P= 0.076). Anatomical factors play a role in the frequency of upper airway symptoms in children with cleft palate. A recent history of at least one episode of MED was associated with an increased frequency of HS. 相似文献
2.
3.
4.
Eric E Rasmussen Autumn Shafer Malinda J. Colwell Shawna White Narissra Punyanunt-Carter Rebecca L. Densley 《Journal of Children and Media》2016,10(4):443-461
This study explored the relationship between active mediation, exposure to Daniel Tiger’s Neighborhood, and key indicators of preschoolers’ social and emotional development. One hundred and twenty-seven children aged 2–6 either watched or did not watch 10 episodes of Daniel Tiger’s Neighborhood over a two-week period. Results revealed that preschoolers who watched the program exhibited higher levels of empathy, self-efficacy, and emotion recognition when their regular TV-watching experiences are frequently accompanied by active mediation. This was especially true for younger preschoolers and preschoolers from low-income families. Implications for policy-makers, parents, producers of prosocial programming, and educators are discussed. 相似文献
5.
《Revista brasileira de otorrinolaringologia (English ed.)》2022,88(5):803-811
ObjectivesTo review the evidence pertaining to the association between cow’s milk protein allergy and recurrent acute otitis media and otitis media with effusion.MethodsThe CENTRAL, Web of Science, EMBASE, MEDLINE, LILACS databases, and gray literature were searched.ResultsFour studies were included, identifying the prevalence rates: 0.2% of delayed speech due to chronic otitis media with effusion in 382 children with cow’s milk protein allergy, 10.7% of cow’s milk protein allergy in 242 children who underwent ENT procedures, 40% of cow’s milk protein allergy in 25 children with recurrent otitis media with effusion and higher tendency to otitis media in children with cow’s milk protein allergy of 186 children (1.5 + 0.6 vs. 0.4 + 0.1; p < 0.1).ConclusionConsidering the characteristics and methodological variations of the identified studies, it is not possible to state that there is reliable evidence of an association between cow’s milk protein allergy and otitis media. 相似文献
6.
《Vaccine》2022,40(43):6255-6270
Swine influenza A virus (swIAV) infections in pig populations cause considerable morbidity and economic losses. Frequent reverse zoonotic incursions of human IAV boost reassortment opportunities with authentic porcine and avian-like IAV in swine herds potentially enhancing zoonotic and even pre-pandemic potential. Vaccination using adjuvanted inactivated full virus vaccines is frequently used in attempting control of swIAV infections. Accelerated antigenic drift of swIAV in large swine holdings and interference of maternal antibodies with vaccine in piglets can compromise these efforts. Potentially more efficacious modified live-attenuated vaccines (MLVs) bear the risk of reversion of MLV to virulence. Here we evaluated new MLV candidates based on cold-passaged swIAV or on reassortment-incompetent bat-IAV-swIAV chimeric viruses. Serial cold-passaging of various swIAV subtypes did not yield unambiguously temperature-sensitive mutants although safety studies in mice and pigs suggested some degree of attenuation. Chimeric bat-swIAV expressing the hemagglutinin and neuraminidase of an avian-like H1N1, in contrast, proved to be safe in mice and pigs, and a single nasal inoculation induced protective immunity against homologous challenge in pigs. Reassortant-incompetent chimeric bat-swIAV vaccines could aid in reducing the amount of swIAV circulating in pig populations, thereby increasing animal welfare, limiting economic losses and lowering the risk of zoonotic swIAV transmission. 相似文献
7.
8.
Rebecca Wright Caleb Ferguson Mustafa Bodrick Hanan Balkhy Debra Jackson Patricia M. Davidson 《Journal of clinical nursing》2020,29(13-14):2723-2729
9.
在现代传媒背景下,媒介素养水平高低直接影响着医药专业人才的培养质量和未来我国医药卫生事业发展。本文探讨国内外媒介素养教育开展情况,分析医药院校大学生媒介素养教育的必要性,提出了在医药院校加强媒介素养教育的新思路。 相似文献
10.
《Surgery (Oxford)》2021,39(9):591-597
Infections of the ear, nose and throat are common. The majority of these infections are managed by the primary care physicians and they settle with conservative and medical management. However, a small group can progress to become troublesome and develop complications to the extent that they may require surgical intervention. Some of the infections can lead to life-threatening complications, therefore awareness and correct diagnosis along with appropriate management is paramount. Foreign bodies in the ear, nose and throat are commonly encountered. The location and type of foreign body can have an implication on the urgency of action and the possible complications. In this article the common ENT infections and foreign bodies and their management are discussed. 相似文献