@Override
  public long[] getPageStatisticsTime() {
    return new long[] {currentPageHeader.getStartTime(), currentPageHeader.getEndTime()};
  }
It will receive a list of offset and execute sequential scan of TsFile for chunkData.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/read/filescan/impl/DiskChunkHandleImpl.java