nǎi / nai / zuì / téng / xī / zhè / ge / cóng / xiǎo / tǐ / ruò / duō / bìng / de / sūn / nǚ / 。

奶奶最疼惜这个从小体弱多病的孙女。

Grandma dotes most on this granddaughter, who has been sickly since childhood.