You'll have to be patient ______ my mother ----she's going rather deaf, which ,after all，also makes her badly cut ______.

A．at; up

B．with; up

C．for ; down

D．on; off

管道吹扫、试压、干燥、置换、投产、清管、管道干线内（外）壁检测等生产活动应编制详细的方案，方案内容应包含哪些？