只是执行了一次push，为何会向数组里push两条相同的数据呢。
百思不得其解。

(this.state.updateTripInfoObj.people.data).push(obj); // 这里
this.state.travellerInfo.after.temporary.people.data.push(obj);

commit('setTripInfoObj', {
    type: 'people',
    res: this.state.updateTripInfoObj.people.data,
});
commit('setTravellerInfo', this.state.travellerInfo);

setTripInfoObj 只会做赋值操作

setTripInfoObj(state, payload) {
    if (payload.type === 'people') {
        state.updateTripInfoObj.people.data = payload.res;
    } else {
        const { address, people, stroke, take } = payload;
        state.updateTripInfoObj = {
            people: people || [],
            stroke: stroke || {},
            address: address || [],
            take: take || {},
        };
    }
},