Phobia refers to the patient's strong fear of a certain object or situation or when interacting with people, and take the initiative to avoid to relieve the anxiety.
According to the above definition, which of the following options is phobia?
The construction worker Xiao Zhang fell off the high fence at one time and caused a fracture. After his recovery, he was afraid of reaching the high place and changed his job. He moved his house to the first floor, and he dared not even watch TV about the high altitude. 