A:Doctor, I slipped and fell on my way to school. The ground is so slippery from the snow. It seems I can't move my left arm now.

B:Let me see. Roll up your sleeve, please. Um... it's swollen and red here. I'm afraid we'll need to take an X-ray to see if it's broken.

A:What if it's broken?

B:Then we'll put you in a cast.

A:Well,we apply tape and plaster to from a solid enclosure to protect the bones from moving. In this way they will heal properly. Take it easy. It won't hurt you.

B:Let me see. The X-ray picture indicates taht your humerus is broken in two places. And you'll have to wear the cast for three weeks. You'll need to come back in two weeks,so I can have another look.

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