Asastrangerenteredalittlecountrystore，henoticedasignwarning，"Danger！Bewareofdog！"postedontheglassdoor.Inside，henoticedaharmlessoldhounddogasleeponthefloorbesidethecashregister."Isthatthedogfolksaresupposedtobewareof？"heaskedtheowner."Yep，that'shim，"camethereply.Thestrangercouldn'thelpbutbeamused."Thatcertainlydoesn'tlooklikeadangerousdogtome.Whyintheworldwouldyoupostthatsign？""Because，"theownerexplained，"BeforeIpostedthatsign，peoplekepttrippingoverhim！"一名陌生人走进一家乡间小商店， ...