The display screen equipment should be placed on the desk properly and a proper posture should be maintained. To prevent eye strain, we should use the 20-20-20 rule which means:

使用顯示屏幕設備應保持良好姿勢，面對屏幕時，為紓緩眼睛疲勞，應遵循的20-20-20 法則是：

Question

The display screen equipment should be placed on the desk properly and a proper posture should be maintained.  To prevent eye strain, we should use the 20-20-20 rule which means:

使用顯示屏幕設備應保持良好姿勢，面對屏幕時，為紓緩眼睛疲勞，應遵循的20-20-20 法則是：

BlackTom AI · Accepted Answer

The question discusses the 20-20-20 rule for reducing eye strain when using display screen equipment, and provides one answer option.
Option provided: 'For every 20 minutes, take a 20-second break and look at something at least 20 feet away.' This statement accurately reflects the widely recommended 20-20-20 rule, which suggests taking a short break every 20 minutes and looking at an object about 20 feet away for 20 seconds to rest the eye muscles and reduce fatigue.
Since the accompanying data shows only this single answer option, there isn’t another choice to compare or contrast. Therefore, we cannot assess alternative interpretations or incorrect options, but we can explain why this option aligns with the established guideline: it prescribes the cadence (every 20 minutes) and the duration (20 seconds) of the break, plus the distance (20 feet) for focusing away from the screen, all of which are core components of the rule.
In summary, the option you provided matches the standard understanding of the 20-20-20 rule, which aims to alleviate eye strain by periodically shifting focus away from the screen to a distant object. This approach helps relax the ocular muscles and prevent fatigue over extended screen time.
If there were additional options, we would scrutinize each against the defining elements of the 20-20-20 guideline (timing, break duration, and focal distance) to determine which statements correctly describe the practice.

SD_GEN_SFTY_BME_FYP_2024 GEN01: Safety, Health and Environmental Protection @ CityU - Quiz 「安健環@城大」- 測驗

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If prolonged viewing of DSE is needed, it is recommended to alleviate eyestrain by following the 20-20-20 rule, which is 要紓緩因持續使用顯示屏幕設備引致的眼睛疲倦，可遵循20-20-20法則，即是：

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