Gaokao Math Practice Question
设 $O$ 为坐标原点, 直线 $x=a$ 与双曲线 $C: \frac{x^{2}}{a^{2}}-\frac{y^{2}}{b^{2}}=1(a>0, b>0)$ 的两条渐近线分别交于 $D, E$ 两点, 若 $\square O D E$ 的面积为 8 , 则 $C$ 的焦距的最小值为 ($\quad$)
- A.4
- B.8
- C.16
- D.32
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