if (jump == 0) {             await db.collection(CollectionName).orderBy('num','asc')             .where({               excel_name:excel_name,               phenomenon:condition[1]             }).limit(num).get().then(res =>{               let data = res.data               let length = data.length               num_record = length               for(let i=0;i<length;i++){                   if (data[i].Quest1 != result_container) {                     result_container = data[i].Quest1                     if(result_container != null){                       if (data[i].Answer1 == null) {                         if (!tip_flag) {tip_flag = true}                          tips.push(data[i].tips)                       }else{                         tips.push('no tips')                       }                       if (p_last < data[i].num) {p_last = data[i].num}                       result.push(result_container)                     }                   }               }             })           }else{             await db.collection(CollectionName).orderBy('num','asc').skip(jump)             .where({               excel_name:excel_name,               phenomenon:condition[1]             }).limit(num).get().then(res =>{               let data = res.data               let length = data.length               num_record = length               for(let i=0;i<length;i++){                   if (data[i].Quest1 != result_container) {                     result_container = data[i].Quest1                     if(result_container != null){                       if (data[i].Answer1 == null) {                         if (!tip_flag) {tip_flag = true}                          tips.push(data[i].tips)                       }else{                         tips.push('no tips')                       }                       if (p_last < data[i].num) {p_last = data[i].num}                       result.push(result_container)                     }                   }               }             })            } 这个从返回的save变量可以看出collection.skip不执行的，程序在调用云函数时依旧报错