Fever is a of many illnesses. So I suggest you take it seriously and see a doctor as soon as possible.
A. message
B. symptom
C. label
D. clue
网友回答
A. message
(答案→)B. symptom
C. label
D. clue
解析：考查名词：A．message信息B．symptom症状C．label标签D．clue线索，句意：发烧是很多疾病的症状，因此我建议你认真对待，尽快看医生。选B。