Reasonable nutrition refers to the amount of various nutrients that each person must ingest from a certain amount of food each day in order to maintain the physiological functions of normal people and engage in labor to meet the various energy needs of the body. Which of the following are not reasonable nutritional purposes? ['Satisfying various energy needs of human body.', 'Maintenance of human physiological functions.', 'Athletes participate in international marathon.', "To replenish workers' energy in order to continue working."]