If you like exploring the wilderness, you should read the following suggestions from search-and-rescue rangers (搜救队) in the national parks.   
Before you head out on a hike, check the weather, take plenty of water, and make sure someone knows where you’ll be and when you’ll be back. Bring clothes to keep you warm when wet, like a waterproof jacket. Avoid cotton, which traps damp.     Take basic precaution, such as waterproof matches, a folding saw, a good knife, a first-aid kit, a flash light, and batteries.
The minute you think you might get lost, stop.    And you should stay calm and think rationally(理性地). If you are not alone, focusing on the needs of others can help hold your own fears at bay. Keeping a sense of humor helps too, it reduces stress and promotes creative thinking.
In general, people who try to find their own way out are far worse than those who stay put(呆在原处).  In a wide-open area, make a signal with colorful gear, make a big X out of rock, or dig a shallow trench, which are easy to spot from above.
You can go several days without eating, so in most cases, you’d better not search for food, since there are lots of poisonous plants in the wild. But you need to stay hydrated(含水的).     If you are lost in your car, stay there: You are more visible to rescuers. And the car provides shelter.

A．Stay visible so anyone searching can see you.

B．First, you’ve got to acknowledge you’re in trouble.

C．And you have no idea where to go.

D．The search-and-rescue people call it death clothes.

E. First of all find a shelter and stay in it in order to keep dry.
F. These suggestions may keep you alive in emergencies.
G. If you run out of water, it’s usually better to drink from a stream with suspect water than to go without.