四季灯谜猜猜猜。

A. It's cold. I put on my hat, scarf, mittens and boots.                              

B. It is warm. I take off my winter clothes.                                             

C. The weather is hot. I put on my shorts and T-shirt.                              

D. It is cool and windy. I put on my pants and sweater.                            

操作人员手部受到外伤，不得接触（），经过（）后，方可参加不直接接触食品的工作。

A、食品、治疗

B、食品或原料、包扎治疗戴上防护手套

C、成品、戴上防护手套