1.at least是一個(gè)介賓詞組,類似于副詞,在句中一般做狀語(yǔ).
它可以放在句首,所以說其后是可以跟句子的.
At least I have you.這種句子是可以的.
再如：At least you look happy.至少你看上去高興.
At least I think so.至少我認(rèn)為是如此.
2.at least作為一個(gè)狀語(yǔ),其位置非常靈活,一般放在其強(qiáng)調(diào)的部分之前.
所以樓主給的例子中,從句意來看,at least就是修飾賓語(yǔ)的.
它還可以修飾其他成分,如以下幾個(gè)例子：
1）修飾主語(yǔ)
At least fifteen were killed.
至少十五人死亡.
2）修飾賓語(yǔ)
Authorities are reporting at least 30 arrests.
當(dāng)局表示,至少有30人被捕.
3）修飾狀語(yǔ)
He went at least once a week.
他至少一周去一次.