In spring , people are feeling refreshed . They take off their heavy winter clothes and walk with a straight back and light steps . They feel they are full of spirits and energy .   Women in particular . They are anxious to get rid of those thick and clumsy winter suits and put on their new fashionable spring dress .   Well , when summer comes , the weather is hot and the leaves turn darkgreen ; the sun is blazing and the air is threatening . No one would like to stay in the open air for long .   That's true . In summer , the first place people want to go is a spacious room with air-conditioning or a quiet river or swimming pool . 