What is the difference between Blockchain and a Database?Generally a database is a collection of data which can be stored and organized using a database management system. The people who have access to the database can view or edit the information stored there. The client-server network architecture is used to implement databases. whereas a blockchain is a growing list of records, called blocks, stored in a distributed system. Each block contains a cryptographic hash of the previous block, timestamp and transaction information. Modification of data is not allowed due to the design of the blockchain. The technology allows decentralized control and eliminates risks of data modification by other parties.
Beth Alaw WilliamsBBC Wales
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4. 暖心服务：编织毯子等手工艺品，分发给患者；带经过认证的宠物（比如一只叫JoJo的蝴蝶犬）探望患者，帮老人缓解情绪、促进康复。