{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does a blockchain database limit the accumulation of historical account data?","a":"Optimizing historical data storage: For completed transactions, they can be stored on the blockchain in chronological order, forming a linear structure. This allows for efficient retrieval and analysis  of historical data, while also preventing excessive accumulation of account data."}]}],"pr":"78a3ad3a651ca582843845c8f24f51c0e1d2203aad9b9bdac3c6fa198bcc924f"}