Phobia is when a patient has a strong fear of a specific object or situation or when dealing with people, and takes the initiative to avoid it to relieve this anxiety. Which of the following are phobias:. ['Xiaohong has been afraid of bugs since she was a child. She hides behind her parents as soon as she sees them. Now Xiaohong is 20 years old and still afraid of seeing bugs. She screams when she sees them.', "The construction worker Xiao Zhang fell from a high fence once and caused a fracture. After he got better, he was afraid to go to a high place and changed his job because of this. He moved his home to the first floor and didn't even watch TV. Shows about aerial work.", 'Yu Yanyan is particularly afraid of the dark. When it gets dark, she must hurry home, unless she goes to a night market with a lot of lights. If it needs to be darker, someone must accompany her before he dares to go.', "Liu Liu is a very introverted person. When she sees a stranger, she blushes. If she is heterosexual, she can't even speak, so she is particularly afraid of social occasions. She is so nervous when she organizes activities."]