While crossing the street, an old man was knocked down by a car and badly __________.

A．wounded

B．ruined

C．injured

D．harmed

胸腔闭式引流放置____小时后，如肺膨胀完全(查体及胸片证实)，8小时内引流液少于____ml，且无_________排出，患者无呼吸困难，即可拔管。