4．What is the purpose of writing this passage?

　　A．To introduce the result of a recent research.

　　B．To advise people to sleep for a longer time.

　　C．To show the disadvantages of short sleeping.

　　D．To explain the advantages of long sleeping.

　　答案：A　写作意图题。根据文章第一段的开篇点题和对文章的整体理解可知，本文是一篇研究报告，写作的主要目的是：介绍研究的成果，故答案A符合文义。

　　B

　　(2016·河北省模拟)Sunstroke is a condition that can quickly go from dangerous to deadly, especially if proper care isn't given immediately.

　　Sunstroke, sometimes called heatstroke, is a result of the body temperature rising above the safe limit. This causes the body's necessary functions to stop working.

　　It's usually pretty easy to avoid sunstroke, as long as proper

　　action is taken. In that case, you need to act as quickly as possible to return that person's body to a safe temperature. Here are a few tips to help treat sunstroke.

　　Call for help

　　Call to get an ambulance as quickly as possible. This should be the first thing you do, especially if the sunstroke person has fainted (昏倒). Also, call for help from anyone nearby if you're in a public place. If there's no one around, call someone nearby if they can get there sooner than an ambulance. Ask everyone to bring you as much water as possible, if there isn't much nearby.

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