at at least

"Can one use “…at at least…”?"(English Language & Usage, https://english.stackexchange.com/questions/263701/can-one-use-at-at-least)

"at at"となる場合もある。

"They differ at at least one position, however: third base."（2つの野球チームを比較した例。「（両チームは優劣つけ難いが）少なくとも一つのポジション、すなわちサードにおいて異なる」

"The dog has snapped at at least three bicyclists"

atより別の前置詞が良い場合。

"They differ in at least one position."（場所）

"They differ on at least one position"（意見）

”Their positions are different on at least one issue."（意見）

"They take different positions regarding at least one issue"（意見）

"no fewer than"で置き換えも可能。