One day, a friend came excitedly to share his good mood with me: "Meiya, I started running." "How long have you been running?" "Before long, I got my annual card in a fitness center." "How many times have you run?" Listening to my question, my friend suddenly felt a little embarrassed, scratched his head and said, "I've only been there once after three months." My tortoise hair temperament comes up, and I like preaching: "in fact, it's really unnecessary to do fitness cards. It&apos...