他真诚地喜欢这个礼物，脸上露出了毫无讽刺的感激笑容。

He genuinely liked the gift, showing an ___unironic smile of gratitude.

他毫无讽刺意味地赞美了那幅幼稚的涂鸦，显得格外真诚。

He gave ___un-ironic praise to the childish doodle, which made his sincerity stand out.