Digital library is the product of the development of computer technology, multimedia technology, network technology, and other related technologies. It has advantages and characteristics unmatched by traditional libraries, and the scope of its services greatly exceeds the walls of libraries. Available, can realize all-weather, fully automatic, intelligent services. In recent years, the construction and research of digital libraries have made great progress in China, including public libraries, college libraries, and various intelligence agencies, etc. , one after another Construction of various types of digital libraries has been carried out to provide users with various forms of services. What is the most accurate summary of this passage? ['Digital libraries represent the direction of future library development.', 'Digital libraries have many advantages and develop rapidly in the country.', 'Great progress has been made in the construction and research of domestic digital libraries.', 'Digital libraries have advantages and characteristics unmatched by traditional libraries.']