The goal of the State's implementation of the "nutrition improvement plan for rural compulsory education students" is to effectively improve the nutritional status and health of rural children. Due to the geographical environment, food resources, dietary habits, and traditional folk customs of different places, to achieve this goal, it is necessary to achieve this goal. On the basis of empirical research on the health and nutritional status of rural children in various regions, we will propose a reasonable food structure and improvement plan according to local conditions. What does this text mainly explain? ['The nutrition of rural children needs scientific improvement.', 'Differences in the way nutrition are improved.', 'Nutrition improvement goals are identified through research.', 'Different regions have different goals for nutrition improvement.']