Music therapy is a systematic intervention process. In this process, the therapist uses the various forms of music experience and the therapeutic relationship developed during the treatment process to help the treatment target achieve health goals. According to the definition above, Which of the following options are music therapy. ['Patient Li feels very comfortable after hearing the music recommended by other patients.', 'The doctor played hypnotic music for Zhou who was nervous and depressed. Zhou said he felt very relaxed.', 'After a therapist listens to some music to the patient, the patient develops discomfort such as vomiting.', 'Therapist Wang heard the sound of gurgling water in front of the mountain spring when he was traveling.']