"at the peak of the pyramid"
A sick plunge at the apex of your stomach.
出自: S. Gibbons
He sailed in and knocked them base over apex into a pile of Brussels sprouts.
出自: P. G. Wodehouse
Our house stood at the apex of two carriage drives.
出自: M. Keane
A community penetrated from apex to foundation by the moral law.
出自: fig.