{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology improve the efficiency of big data storage and processing?","a":"Chain-based Data Structure: Blockchain uses a chain-based data structure where data is linked in  sequence, with each data block containing a reference to the previous one. This structure ensures the immutability of data while facilitating data query and verification."}]}],"pr":"bdf2d814fa4343023389ada1b015406ed755ccaec9c9d8cc9496a3d1bbcd0014"}