■ (or at that): thereupon; having said or done that
■ immediately after that; thereupon, therewith
- thereupon the entire class applauded.
- with that, she left the room.
- I therewith withdraw my complaints
- "I still think you're wrong, " he said and with that he drove off.
- He gave a little wave and with that he was gone.
... Collins, WordNet, CALD, LDOCE
■ at that: (completive-intensive) additionally, all things considered, or nevertheless
- he's a pleasant fellow at that.
- I might decide to go at that.
- It's too expensive, and probably out-of-date at that.
... Collins, CALD