B

　　(2016·温州检测)

　　Dear Dr.Cory，

　　I have allergies(过敏反应)．It feels like something is in my throat.What is it and what should I do to help it?

　　Christa

　　Dear Christa，

　　You might be feeling mucous in your throat.The membranes there make mucus to keep nasal passages(鼻腔)moist and clean and to warm the air that we breathe.But sometimes our bodies make too much mucus，and it can collect at the back of the throat.Drinking lots of liquids，especially warm ones，may help.

　　Dear Dr.Cory，

　　Sometimes when I don’t wear any socks with my shoes I get blisters(水疱)．What are blisters？How can I avoid them?

　　Jacy

　　Dear Jacy，

　　Blisters occur when something like the back of your shoe rubs against your skin and causes tiny blood vessels to leak fluid(液体)．The blister acts like a pillow to protect damaged skin while it repairs itself.

　　The best way to prevent blisters is to avoid“rubbing”spots.If the problem is your shoes，wear socks and shoes that fit to help prevent blisters.

　　Dear Dr.Cory，

　　I like reading your column.It tells me a lot about the body and how it works.I have a question for you：I have not been airing my feet out lately and the bottoms of them have been turning crisp(起皱的) and the skin is peeling.Why?

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