Well, lice is still a problem in school kids sometimes. Cut everybody's hair short, shave body hair if necessary, wash linens and tumble dry at high heat. Tell your daughter not to have body contact, especially head, with her classmates, and not to share hat with anyone. It may go back and forth among those kids.
可用硫黃皂洗頭, 或者用醋. 洗完頭馬上吹幹. 如果嚴重的話還是去配點藥水來洗吧.