This paper aims to analyze the effects of physical activity, screen time, and academic burden on adolescent health in China and compare their effects by using the nationally representative sample data from the CEPS (China Educational Panel Survey) cross-section data. This paper first uses regression analysis to examine the relationship between physical activity, screen time, academic burden and health among Chinese adolescents. Then, this paper uses the clustering analysis the influence of physical activity, screen time, and academic burden on the health of Chinese adolescents. The empirical results show that: (1) along with exercise, helping with the housework also has a clear health-promoting effect on adolescents; (2) the time spent surfing the Internet or playing video games, and heavy studying or homework off campus have a negative effect on adolescents’ self-rated health and mental health; (3) physical activity has the greatest impact on self-rated health, while screen time has the greatest impact on mental health, and academic burden is not the most important factor affecting adolescent health in China.

Many scholars focus on China’s booming economy and its social impacts, while there is little attention regarding subjective well-being, especially after considering income and social capital. Therefore, the purpose of this paper was to examine the correlations between income, social capital and subjective well-being of western Chinese residents, basing on a representative comprehensive social survey. Several meaningful conclusions are shown below: (1) Western residents in China retain a relatively high degree of subjective well-being on average, and the mean value of subjective well-being for urban residents is slightly higher than that for rural residents; (2) there are regional and group differences in the influence of income and social capital on residents’ subjective well-being; and (3), although economic factors play a primary role in subjective well-being, the potential influence of non-economic factors cannot be ignored. This paper attempts to fill the gap in perspective regarding potential correlations between income, social capital, and subjective well-being.

经济的快速发展加剧了化石能源消耗，带来的碳排放压力日益显著。地热能作为清洁能源，在优化能源结构、助力国家“碳达峰”与“碳中和”目标落地方面潜力巨大。本研究以关中地区中深层地热能为研究对象，围绕水热型采灌平衡供暖技术系统与换热型供暖技术系统2种典型开发路径，构建了涵盖经济效益、社会效益和环境效益的综合效益评价指标体系。本研究通过引入层次分析法（AHP）确定各评价指标的权重，再结合灰色关联度模型对两种技术路径的综合效益进行了定量评估。研究结果表明：水热型采灌平衡供暖技术系统的综合效益关联度达0.807，显著高于换热型供暖技术系统的0.728；其中，水热型采灌平衡供暖技术在经济效益维度优势尤为突出，社会效益表现次之；而在环境效益方面，两种技术方案均表现出良好的节能减排效果。为此，从经济、社会与生态环境等多维效益协同提升的整体视角出发，水热型采灌平衡供暖技术系统更适宜在地热资源条件优越的关中盆地地区优先推广应用，可为推动区域能源结构转型、实现绿色低碳发展提供现实路径。