"One-door" government service: refers to the service behavior of concentrating matters that would otherwise have to be run by multiple government departments into one service center or simplifying to one window to facilitate the masses. Which of the following are "one-stop" government services:. ['A city has established a comprehensive social governance cloud platform to push the social problems found in multiple channels to the corresponding functional departments in accordance with standardized procedures, clarify the responsible person and solve them within a limited time, avoiding the push between the departments.', 'A city has recently established a service station for people with disabilities. Previously, people who applied for living allowances had to bring an application form to the disability federations at all levels for approval and stamping. And done.', 'In order to solve the problem of difficult medical treatment for patients, the city hospital opened a convenience clinic on the first floor and selected a group of doctors with excellent medical skills. Patients can complete the entire process of registration, admission, payment, and medication collection.', 'The guardian of a school-aged child who was not registered in a city in the past needs to submit the hukou, housing, work certification, and other materials on the spot. Now, as long as the online registration system specially set up by the education department can submit all the materials in one click.']