— The earthquake last night was really terrible.

— ______, no people were injured or killed, and they escaped in time.

A．Luckily

B．Hopefully

C．Sadly

D．Unfortunately

在选择多媒体数据压缩算法时需要综合考虑（）

A．数据质量和存储要求

B．数据的用途和计算要求

C．数据质量、数据量和计算的复杂度

D．数据的质量和计算要求