缓存系统用的 SQLite 加文件系统双层架构，避免重复处理，降低费用消耗。
Injuries caused by e-bikes are becoming "almost business as usual" in paediatric and adult major trauma centres, says Dr Brian Burns, a trauma specialist at Sydney's Royal North Shore Hospital.
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Running it locally
Also from 18 to 39, she said people tended to neglect themselves by "working more hours than we do for the rest our lives".
if new_state == "connected":