The concept of 'circadian rhythm' refers to the innate biological cycles that regulate physiological processes in living organisms, typically synchronized with the 24-hour day-night cycle. Recent research has revealed that these rhythms are not merely responses to external light cues but are driven by an internal 'master clock' located in the suprachiasmatic nucleus of the brain. However, modern lifestyles, characterized by irregular sleep patterns, shift work, and excessive artificial light exposure, often disrupt this internal timing. Such desynchronization has been linked to metabolic disorders, cognitive impairments, and even increased cancer risk. Interestingly, studies suggest that timed eating and consistent exposure to natural light can help realign the internal clock with the external environment, offering a non-pharmacological strategy to mitigate the negative health impacts of circadian disruption.
❓ Theo đoạn văn, nguyên nhân chính gây rối loạn nhịp sinh học trong các xã hội hiện đại là gì?
A. A. Sự vắng mặt của đồng hồ chủ sinh học ở một số cá nhân
B. B. Giấc ngủ không đều đặn và tiếp xúc với ánh sáng nhân tạo vào những thời điểm không phù hợp
C. C. Việc lạm dụng quá mức các loại thuốc hỗ trợ giấc ngủ
D. D. Tiếp xúc với ánh sáng tự nhiên vào ban ngày
✅ 正确答案
B. Irregular sleep patterns and exposure to artificial light at inappropriate times
IELTS Reading Tips
Skim the questions first, underline keywords, then locate in the passage
Watch for paraphrasing; correct answers are often reworded
Be wary of absolute statements (all, always, never) — usually wrong
Pay attention to content after transition words (however, but, yet)
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