Fù / qīn / yì / yǎn / jiù / kàn / chū / ér / zi / zài / dān / xīn / shén / me / zhēn / shì / zhī / zǐ / mò / ruò / fù

父亲一眼就看出儿子在担心什么，真是知子莫若父。

The father immediately saw what his son was worried about; no one understands a son better than his father.