446:Why doctors support bike lanes: they're healthier for everyone

Riding a bike is a convenient way for residents in metropolis on the way from home to subway station. But there is also a problem, it's too frequent phenomenon that your bikes are stole by thieves. To solve the problem, Ofo comes out. With more cyclists appearing, the risk of riding is matter. Yesterday I crashed two bikes in just ten minutes, which made me hurt. 

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