这个问题需要立即处理。

This issue requires attention ___without ___delay.

预订完成后，我会立即把确认信息发给你。

I'll send you the confirmation ___without ___delay once the booking is complete.

医护人员立即赶到并提供了紧急救治。

The paramedics arrived ___without ___delay and provided emergency care.