HarmonyOS LazyDataSource加载更多的时候如何不整个列表刷，而只刷新后续加入的

public appendArrayData(addData: ObservedArray<T>): void { 
 this.dataArray.push(...addData); 
 this.notifyDataReload() 
}
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public appendArrayData(addData: ObservedArray<T>): void { 
 this.dataArray.push(...addData); 
 this.notifyDataReload() 
}
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