Rashi on Genesis 24:44/רש"י על בראשית כ״ד:מ״ד

1גם אתה DRINK THOU ALSO — Her use of the word גם, also suggests that she intended to include the men who accompanied him.

2הכיח means selected and designated. So, too, wherever this word (the Hiphil of יכח) occurs in the Scriptures it signifies “making something clear”.