Dr. Kanner cured the girl by ______.

A．Our daily routine and realities are very important to maintain the internal clock structure.
B．People should keep themselves busy in order to maintain the internal clock structure.
C．Once the internal clock structure is disrupted, we feel very uncomfortable.
D．Once the internal clock structure is disrupted, it takes some time for the structure to function properly again.

A．He has nothing to do during the holidays and so he feels useless.
B．His routine timetable is changed so he doesn' t feel comfortable.
C．He doesn' t have any responsibilities and pressures, so he feels uneasy.
D．If he feels happy during the holidays, work will be more unbearable when the holidays are over.