全文获取类型
收费全文 | 3104554篇 |
免费 | 221478篇 |
国内免费 | 4512篇 |
专业分类
耳鼻咽喉 | 43460篇 |
儿科学 | 101429篇 |
妇产科学 | 83591篇 |
基础医学 | 452850篇 |
口腔科学 | 86269篇 |
临床医学 | 279962篇 |
内科学 | 595231篇 |
皮肤病学 | 69132篇 |
神经病学 | 241868篇 |
特种医学 | 117722篇 |
外国民族医学 | 676篇 |
外科学 | 467314篇 |
综合类 | 63870篇 |
现状与发展 | 13篇 |
一般理论 | 1056篇 |
预防医学 | 236712篇 |
眼科学 | 73218篇 |
药学 | 237414篇 |
18篇 | |
中国医学 | 6679篇 |
肿瘤学 | 172060篇 |
出版年
2021年 | 24795篇 |
2019年 | 24986篇 |
2018年 | 34746篇 |
2017年 | 26406篇 |
2016年 | 29855篇 |
2015年 | 33419篇 |
2014年 | 46871篇 |
2013年 | 70042篇 |
2012年 | 96123篇 |
2011年 | 102220篇 |
2010年 | 60633篇 |
2009年 | 57032篇 |
2008年 | 95345篇 |
2007年 | 101689篇 |
2006年 | 102679篇 |
2005年 | 99044篇 |
2004年 | 94928篇 |
2003年 | 91439篇 |
2002年 | 88414篇 |
2001年 | 146223篇 |
2000年 | 150384篇 |
1999年 | 126192篇 |
1998年 | 35587篇 |
1997年 | 31243篇 |
1996年 | 31557篇 |
1995年 | 29677篇 |
1994年 | 27293篇 |
1993年 | 25740篇 |
1992年 | 97161篇 |
1991年 | 94461篇 |
1990年 | 92616篇 |
1989年 | 89090篇 |
1988年 | 81670篇 |
1987年 | 80058篇 |
1986年 | 75179篇 |
1985年 | 71668篇 |
1984年 | 53050篇 |
1983年 | 45081篇 |
1982年 | 26311篇 |
1979年 | 48554篇 |
1978年 | 34144篇 |
1977年 | 29066篇 |
1976年 | 27058篇 |
1975年 | 29610篇 |
1974年 | 35118篇 |
1973年 | 33612篇 |
1972年 | 31799篇 |
1971年 | 30027篇 |
1970年 | 27664篇 |
1969年 | 26479篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Timothy J. Cordingley Mark A.G. Wilson Kathryn M. Weston 《Health & social care in the community》2022,30(1):353-359
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
22.
23.
Malunguja Gisandu K. Devi Ashalata 《Proceedings of the National Academy of Sciences, India. Section B.》2022,92(1):105-120
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences - Heavy metal concentrations in surface soils of Reserved Forests (RFs) have a significant impact on... 相似文献
24.
25.
Purnima Gogoi Geetika Kaur Nikhlesh K Singh 《World journal of gastroenterology : WJG》2022,28(46):6497-6511
Colorectal cancer (CRC) is the third most diagnosed cancer and the second leading cause of cancer-related mortality in the United States. Across the globe, people in the age group older than 50 are at a higher risk of CRC. Genetic and environmental risk factors play a significant role in the development of CRC. If detected early, CRC is preventable and treatable. Currently, available screening methods and therapies for CRC treatment reduce the incidence rate among the population, but the micrometastasis of cancer may lead to recurrence. Therefore, the challenge is to develop an alternative therapy to overcome this complication. Nanotechnology plays a vital role in cancer treatment and offers targeted chemotherapies directly and selectively to cancer cells, with enhanced therapeutic efficacy. Additionally, nanotechnology elevates the chances of patient survival in comparison to traditional chemotherapies. The potential of nanoparticles includes that they may be used simultaneously for diagnosis and treatment. These exciting properties of nanoparticles have enticed researchers worldwide to unveil their use in early CRC detection and as effective treatment. This review discusses contemporary methods of CRC screening and therapies for CRC treatment, while the primary focus is on the theranostic approach of nanotechnology in CRC treatment and its prospects. In addition, this review aims to provide knowledge on the advancement of nanotechnology in CRC and as a starting point for researchers to think about new therapeutic approaches using nanotechnology. 相似文献
26.
27.
Troppmair Teresa Egger J. Krösbacher A. Zanvettor A. Schinnerl A. Neumayr A. Baubin M. 《Der Anaesthesist》2022,71(4):272-280
Die Anaesthesiologie - Die Qualität eines Rettungssystems zeichnet sich auch durch den effizienten Einsatz seiner personellen und Fahrzeugressourcen aus. So können im berechtigten Fall... 相似文献
28.
Esin Benli Küçük Ercan Kaydok Kürsad Ramazan Zor Gamze Yıldırım Biçer 《Topics in stroke rehabilitation》2020,27(8):630-635
ABSTRACT Objective: Dry eye is reported to be associated with several neurological diseases. The aim of this study is to evaluate the patients with hemiplegia after stroke for dry eye and compare their results with a control group. Materials and methods: Forty-five patients with hemiplegia and 45 individuals as the control group were included in the study. Tear function tests (Schirmer and tear breakup time) and a dry eye questionnaire for dry eye symptoms (ocular surface disease index) were performed and the results of the two groups were compared. Results: Schirmer test results were significantly lower in the post-stroke hemiplegia group compared to the control group (11.3 ± 8.2 mm and 20.6 ± 11.6 mm, respectively, p < .001). Tear breakup time results were significantly lower in the post-stroke hemiplegia group compared to the control group (7.9 ± 3.1 s and 12.1 ± 4.3 s, respectively, p < .001). Ocular surface disease index scores were not significantly different between hemiplegia and control groups (21.6 ± 20.0 and 19.8 ± 13.9, respectively, p = .635). Schirmer scores lower than 10 mm (60% and 30%, p < .001) and tear breakup time results lower than 10 s (65.6% and 28.9%, p < .001) were also higher in the hemiplegia group compared to control group. Conclusion: We found lower Schirmer test and tear breakup time results and similar OSDI scores in hemiplegia patients compared to controls. Hemiplegia patients may have dry eye without typical symptoms. This should be taken into consideration in the follow-up and rehabilitation of post-stroke hemiplegia patients. 相似文献
29.