at a (single) stroke

US /æt ə ˈsɪŋɡəl stroʊk/
UK /æt ə ˈsɪŋɡəl stroʊk/
"at a (single) stroke" picture
1.

in un colpo solo, di colpo

with a single action or effort; all at once

:
He solved all the problems at a single stroke.
Ha risolto tutti i problemi in un solo colpo.
The new policy changed everything at a stroke.
La nuova politica ha cambiato tutto in un colpo solo.