A 14-year-old child exhibits long periods of hand-washing, spending 2 to 3 minutes each time, even in snowy weather; using the bathroom and bathing take up to 30 to 40 minutes. They speak to their parents rudely, are easily angered, and even have intentions of running away after arguing with their father, holding a suspicious attitude towards him. For the past two days, they have been emotionally low, losing interest in everything, and crying for 1 to 2 hours at home after poor final exam results.