单选题 Which of the following statements about external otitis is true?

A. External otitis is eharaeterized by pain when the pinna of the ear is pulled.
B. External otitis is usually accompanied by a high fever in children.
C. External otitis is usually related to an upper respiratory infection.
D. External otitis can be prevented by using cotton-tipped applicators to clean the ear.

【正确答案】 A

【答案解析】External otitis is an infection of the external ear. Pain can be elicited when the pinna of the ear is pulled. Fever and accompanying upper respiratory infection occur more commonly in conjunction with otitis media (infection of the middle ear). Cotton-tipped applicators can actually cause external otitis so their use should be avoided.