間髪を入れず、迅速かつ的確な応対、畏れ入ります。

Such an accurate, lightning-quick reply. What can I say?

今回の成果はひとえに彼の獅子奮迅の働きの賜物でしょう。

Our latest results are the fruit of his furious efforts.

あなたの迅速な返事が是非とも必要です。

Your prompt reply is urgently required.

下記の指示に従いさえすれば、すぐに白票と同様に容易かつ迅速にフルカラーの書類を印刷することができる。

Simply follow the instructions below, and in no time you will be printing full color documents just as easily and quickly as black and white.

脳手術の最中は、医者も看護婦も慎重に、しかもできるだけ迅速に患者を扱わなければならない。

While a brain operation is being performed, both doctors and nurses must handle the patient with kid gloves and yet with all speed practical.