例 let arr = [ { date: '2018-01-06',SW: '90.95', LL: '136', XXSW: '80.22',CKLL: '500' }, { date: '2018-01-06', SW: '164.95', LL: '137', XXSW: '99.22', CKLL: '93' }, { date: '2018-01-07', SW: '176.95', LL: '236', XXSW: '99.22', CKLL: '93' }, { date: '2018-01-07', SW: '178.95', ...