nǐ / yuàn / yì / bāng / wǒ / xiū / gǎi / zhè / fèn / bào / gào / zhēn / shì / zhèng / zhòng / xià / huái

你愿意帮我修改这份报告，真是正中下怀。

Your willingness to help me revise this report is exactly what I wanted.