目前没有研究显示为什么大量阅读会导致这一结果，但是由于长时间聚焦近处的物体需要眼部肌肉持续收缩以保证视网膜保持需要的形状，因此这种眼肌的持续收缩状态可能会使眼球受到拉伸，长期如此，其原有形状可能会被永久地改变，从而导致近视产生。

But focusing on close objects involves contraction of muscles controlling the shape of the eye's lens. And one possibility is that "this constant contraction may stretch the eyeball.

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因此，在查询中合并事实表从而生成结果所需的时间比预期要长。

Therefore the query may take longer than expected as it is also incorporating the fact table in the query to produce results.

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另外，由于分数更新逻辑遵循check - then - act模式，因此可能出现两个线程“争夺”更新最高分，从而导致难以预料的结果。

Further, because the score-updating logic follows the check-then-act pattern, it is possible for two threads to "race" to update the high score, with unpredictable results.

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