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Summer vacation is a good time to travel. our country is vast, the terrain and climate are very different, and the natural conditions in the mountains are even more complex, so you should pay attention to the topography and weather conditions of the destination in advance, if the weather is unstable and you do not understand the local topography and geology, it is best to avoid traveling; Do not climb the peak during thunderstorms, do not take shelter from the rain under trees, and do not hold iron railings to prevent lightning strikes; When it rains heavily in mountainous areas, flash floods are fierce, don't...