Group 1 - The article discusses the transition of children from vacation mode to school mode as the new school year approaches, highlighting expert suggestions for parents to facilitate this change [4] - It emphasizes the importance of preventing three types of infectious diseases during the school season, including respiratory, intestinal, and mosquito-borne diseases [5][6] - The article provides five protective measures to prevent these diseases, such as handwashing, maintaining home hygiene, ensuring good lifestyle habits, timely vaccination, and monitoring children's health [6][7] Group 2 - The article addresses health challenges faced by adolescents, including myopia, obesity, spinal curvature, and psychological issues, and emphasizes the role of sports in promoting both physical and mental health [8][9] - It outlines principles for youth sports participation, including diversity in sports, gradual intensity increase, and a balance between individual and team activities [9][10] - Key elements for children's physical activity are highlighted, such as ensuring adequate outdoor time, proper eye care, and maintaining good posture to prevent health risks [11] Group 3 - The article identifies signs of depressive emotions in children as they transition back to school, including mood changes and behavioral differences, and distinguishes between depressive emotions and clinical depression [12][14] - It suggests methods for parents to help children manage these emotions, including emotional expression, preparation for school routines, and stress management techniques [14]