问题: Accordingtotheauthor,insomniashouldn’tbeaseriousproblembecause
A: itscausecanbecorrectedbymakingoneselffeeltiredenough.
B:doctorscancureiteasily
C:somepeoplecancatchupontheirsleepduringtheday
D:somepeopledon’tneedsomuchsleep.
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