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The study of sleep and circadian rhythms explores how humans and animals regulate their sleep-wake cycles. This fi examines t biological clo that man daily rhy , influenced b factors su as li and tempe . Understanding proc of this kind helps in addressing sleep disorders and optimizing work schedules. Research in this area is crucial for improving health, productivity, and well-being in modern societies. Recent studies have identified specific genes responsible for circadian regulation, while melatonin production and seasonal affective disorder demonstrate the profound connection between environmental cues and internal biological timing mechanisms.
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参考答案：eld he cks age thms y ch ght rature esses