答案：D
留意 $\dfrac{1}{\pi^4} = 0.010\ 265\ 982$。則可得
留意 $\dfrac{1}{\pi^4} = 0.010\ 265\ 982$。則可得
$\begin{array}{cl}
& 0.010\ 265\ 982 \\
= & 0.010\ 3 \text{(準確至三位有效數字)}
\end{array}$
$\begin{array}{cl}
& 0.010\ 265\ 982 \\
= & 0.010\ 27 \text{(準確至四位有效數字)}
\end{array}$
$\begin{array}{cl}
& 0.010\ 265\ 982 \\
= & 0.010\ 27 \text{(準確至五位小數)}
\end{array}$
$\begin{array}{cl}
& 0.010\ 265\ 982 \\
= & 0.010\ 266 \text{(準確至六位小數)}
\end{array}$
