To relieve abdominal distension, anal canal can be used to exhaust; When severe abdominal distension occurs, fasting and intermittent gastrointestinal decompression can be performed; Encourage patients to eat less and more meals, eat more vegetables and high-fiber foods, and limit the consumption of gas-producing foods; Encourage patients to do more activities, especially after meals, assist patients to do appropriate activities and promote intestinal activities to relieve symptoms. So choose C.