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Abstract Background Zinc has been proven to be effective against periodontitis, and also reported to reduce the risk of cardiovascular diseases (CVD). This study aims to explore the regulatory effect of zinc intake on the association between periodontitis and atherosclerotic cardiovascular disease (ASCVD). Methods This was a cross-sectional study based on the National Health and Nutrition Examination Survey (NHANES). Logistic regression model was used to explore the association between zinc-RDA or periodontitis and 10-year ASCVD risk ≥ 20%, and results were shown as odds ratio (OR) and 95% confidence interval (95% CI). The regulatory effect of zinc intake on the association between periodontitis and 10-year ASCVD risk ≥ 20% was also assessed using logistic regression model. Subgroup analysis was performed based on age, gender, obesity, education level, lipid-lowering therapy, and dental floss. Results 6,075 patients were finally included for analysis. Zinc intake reaching the recommended level (OR = 0.82, 95%CI: 0.69–0.98) and periodontitis (OR = 2.47, 95%CI: 2.04-3.00) were found to be associated with 0.82-fold and 2.47-fold odds of 10-year ASCVD risk ≥ 20%, respectively. In addition, we found that the odds of 10-year ASCVD risk ≥ 20% was lower in patients with zinc intake reaching the recommended level than those without [OR (95%CI): 2.25 (1.81–2.80) vs. 2.72 (2.05–3.62)]. The similar regulatory effect was found in patients with age ≥ 60 years and

Based on the theories of industrial structure and settlement environment, this paper conducts a quantitative and qualitative study to investigate how the evolution in the industrial structure of the island affects the settlement environment with relevant statistical data, local chronicles, and questionnaire survey data. The study found that the industrial structure of Liuheng Island has transformed from a fishery-led to industry-led island, which has led to the rapid increase of urbanization on Liuheng Island, and the public service facilities have been increasingly densely distributed urban-type communities with high modernization levels, such as Longshan Community, Xuanzhuotou Community, and Taimen Community. The local residents of Liuheng Island are also satisfied with the public service facilities in terms of facility availability, transportation convenience, environmental comfort, and environmental health. For a period, the island residents were particularly concerned about the regional differences in environmental health, and the main reasons were the industrial structure upgrade towards industrialization, which would cause certain industrial waste emissions, and the pressure of commuting within the island, which would affect residents’ sense of security. This indicates that the evolution of industrial structure will directly affect the speed and quality of urban and rural settlement hardware construction and also, to a certain extent, the subjective perceptions of residents around the dense industrial areas on the state of the settlement, especially in terms of environmental health and community living safety.

We studied the misalignment between tourism resources and economic development in mountainous cities in the context of limited highway network accessibility. Using Lhasa City as a case study, we illustrated how to evaluate tourism resources and economic development and how to improve tourism resources and promote economic development. The tourism resources possessed by tourism destinations are prerequisites for tourism activities. This study focuses on the coupling coordination relationship between the degree of superiority in tourism resources and the level of economic development in Lhasa City. Data from Lhasa City in 2010, 2015, and 2020 were compared to explore a way of optimizing the spatial pattern of tourism development. The results of this study are as follows. (1) As a typical mountainous area on the Qinghai–Tibet Plateau, the accessibility of Lhasa’s mountainous area largely influences the choice of tourist destinations and is also an important indicator for evaluating the degree of tourism resource superiority. (2) On the whole, the economic development of Lhasa City and the degree of tourism resource superiority is not coordinated, mainly in the low coupling coordination stage, and with the passage of time, the degree of coupling coordination gradually becomes weaker. (3) If a town has advantageous tourism resources with slow economic development, it is easy to fall into the “resource curse” dilemma. In addition, if a town has poor tourism resources, it will be reduced to an outflow area of population and resources after leaving the investment drive, and easy to fall into the dilemma of the “poverty trap”.

The identification and depiction of the externality of urban facilities have always been a hot and challenging research issue in human geography and urban planning. However, most of the existing research focuses on exploring the capitalization effect of urban facilities on land prices or housing prices, while ignoring the guiding and promoting effect on related industries. Therefore, this paper proposes an identification method of the externality of cultural facilities from the perspective of cultural industrial agglomeration and industrial abundance, explores the spatial coupling between cultural facilities and cultural enterprises in the central district of Ningbo during different periods, and discusses the role mechanisms of cultural facilities in cultural industry development. Our findings reveal that the spatial pattern of cultural facilities and cultural enterprises evolved in the same way, from single-core or double-core multi-point to “triple-core multi-point,” and there is a certain similarity between the change in the agglomeration pattern of cultural facilities and the evolution of the abundance of cultural enterprises. The externality of cultural facilities is mainly manifested in the promotion of quantitative growth, such as the scale of cultural industry agglomeration and qualitative development, such as industrial structure. These outcomes are mainly realized through the creation of cultural atmosphere, the integration of cultural and commercial functions, and the improvement of cultural consumption and cultural productivity. The research results can offer new policy references for the location and layout of cultural facilities and the incentive development of the cultural industry in Ningbo.

The accessibility of mountain tourist attractions is a prerequisite to enhancing the attractiveness of tourist attractions and driving the well-being of local residential areas, which increases people’s prosperity and the sustainable development of tourist attractions, and achieves the UN’s Sustainable Development Goals (SDGs). This paper focuses on the accessibility of typical mountainous areas in the Qinghai–Tibet Plateau, and uses the cost distance and OD distance methods under the guidance of core-edge theory to explore the changes of accessibility of traffic nodes, tourist attractions, and residents with the future enrichment of the traffic road network. The results show that: (1) The change in accessibility will highlight the location advantages of some tourist attractions, which can be prioritized in the context of similar tourist attractions; (2) Regional accessibility improvements require a combination of traffic modes to maximize impact; (3) Residents of different multi-core circles could choose various industrial development patterns based on the accessibility of tourist attractions and residential areas; (4) Group development according to the spatial location and accessibility of tourist attractions can facilitate the virtuous drive among tourist attractions, which achieves the goal of integrated tourism.