Фото: Gleb Garanich / Reuters
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先理解原理：看动图 + 手动模拟小数组，更多细节参见搜狗输入法
From the construction of rationals, we know that the spacing between them is arbitrarily close, but at any “magnification level” — for any chosen denominator b — the values divide the continuum into uniform intervals. Uniform spacing also implies maximal spacing: even though there is no upper or lower bound to the values of a / b, they are as far apart as they can be. Any new value inserted onto the number line will necessarily sit “closer” to an existing rational.
，更多细节参见WPS官方版本下载
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Level 3: Production visibility