Onarrivinghome,theboytoldhisparentsaboutallthe______whichoccurredinhisdormitory.
_____youunderstandthisrule，you‘llhavenodifficultyindealingwithsuchproblems.
名词解释：氧气治疗
Thesuspectcooperatedfullywiththepolicewhen______abouthisroleintheincident.
简述急性肾小球肾炎患儿饮食管理的要点。
