Indigestion: Abdominal discomfort caused by long-term irregular diet, love of irritating food, or overeating. Which of the following is not a manifestation of indigestion? ["Zhao Liang is the company manager. He often has to accompany customers to eat at 8 or 9 o'clock in the evening. Every time when he returns home, it is too late to lie in bed.", 'Xiao Zhang is a white-collar employee of an IT company. He usually works very nervous, stays up late, eats very irregularly, is hungry before going to bed at midnight, and eats high-calorie fast food.', "Gao Yang, who especially loves Sichuan spicy hot pot, hasn't come to work in recent days. When my colleagues asked about it, Gao Yang met with friends a few days ago, ate a lot of peppers, and had a severe pain in his stomach.", 'Lao Zhou has always been accustomed to drinking strong tea and smoking, and sometimes his stomach has acid reflux.']