Abstract: Use of a compound represented by formula (I) or a stereoisomer, hydrate, metabolite, solvate, pharmaceutically acceptable salt, eutectic, or a composition thereof in preparation of a drug for treating pruritus. Also provided is a method for treating pruritus, the method comprises administering an effective dose of the compound represented by formula (I) or the stereoisomer, hydrate, metabolite, solvate, pharmaceutically acceptable salt, eutectic, or a composition thereof.

Abstract: Provided is a liquid sample sampling device used in an operation, and belongs to the technical field of sampling devices. The sampling device includes a negative pressure suction head, an auxiliary tube connected with a side wall of the negative pressure suction head, and a sampling bottle connected with the auxiliary tube. A rebound connecting plate is arranged at a position connecting the negative suction head and the auxiliary tube. The side wall of the negative pressure suction head is provided with a push switch. A diameter of the auxiliary tube is larger than a diameter of the negative pressure suction head. The push switch is an elastic membrane switch.