Abstract: A video-based interaction method includes playing a video on a video playback interface to which a target object is logged in, acquiring a local viewing marking record of the video and scene identifiers of markable scene clips in the video, comparing the local viewing marking record with the scene identifiers to determine an unmarked target scene clip in the video, displaying, in response to playing to the target scene clip and on the video playback interface, a target scene clip marking entry that indicates performing viewing marking on the target scene clip, and displaying a viewing marking credential for the target clip in response to a viewing marking trigger operation on the target scene clip marking entry. The viewing marking credential covers a part of the video playback interface, is an independent operable object, and includes description information of the video and identity information of the target object.

Abstract: An artificial respiration apparatus for first aid is provided, and relates to the field of medical first-aid supplies. The artificial respiration apparatus comprises an adhesive film, wherein a fixing block is provided on an upper end of the adhesive film; a first adhesive strip is provided on a lower end of the adhesive film; a second adhesive strip is also provided on the lower end of the adhesive film; and a blowing device is inserted in the fixing block. An intraoral ventilation pipe is inserted into the mouth of a person to be rescued, then the adhesive film is applied to the mouth and nose of the person to be rescued, and finally air is blown into a blowing port such that the blown air enters the body of the person to be rescued through a ventilation pipe, and the intraoral ventilation pipe.

Abstract: The present application relates to the technical field of wastewater treatment and rapid pollutant detection, in particular to a chitosan-polyacrylamide composite porous hydrogel, preparation and use thereof, and a metal ion-adsorbing and detecting reagent and method. The chitosan-polyacrylamide composite porous hydrogel of the present application is prepared by in situ polymerization of a chitosan sol, an acrylamide, a crosslinking agent and a surfactant into a mixed solution comprising liquid droplets, followed by steps of curing, washing, and freeze-drying. The present application further provides a metal ion-detecting reagent, which is obtained by adsorbing a color developing agent into the chitosan-polyacrylamide composite porous hydrogel as described above, wherein the color developing agent is a dye that changes color when encountering metal ions. The chitosan-polyacrylamide composite porous hydrogel of the present application has balanced mechanical properties and porosity.