按《广东电网公司中低压配电运行管理标准实施细则》故障处理要求，对故障处理的主要任务和原则以下说法正确的是（）。

A.尽快查明故障地点和原因，隔离故障设备，防止故障扩大

B.尽量缩小故障停电的范围，减少故障损失

C.如发生严重危及人身或设备安全情况，也需经许可方可断开电源

D.对已停电的用户尽快恢复供电

On a scale that measures the intensity of a certain phenomenon, a reading of n+1 corresponds to an intensity that is 10 times the intensity corresponding to a reading of n. On that scale, the intensity corresponding to a reading of 8 is how many times as great as the intensity corresponding to a reading of 3 ？（）

A．5

B．50

C．10⁵

D．5¹⁰

E．8¹⁰-3¹⁰