1. A method for ranking based on interpersonal distances, comprising: obtaining, by a ranking server, objects queried by a query request initiated by a user from a user client and obtaining a reference user group corresponding to each queried object; obtaining, by the ranking server, interpersonal distances between users in the reference user group and the user who initiates the query request, and obtaining rating scores of each of the objects queried by the query request that are given by the users in the reference user group; and determining, by the ranking server, a user relationship ranking index of each of the objects queried based on the interpersonal distances and the rating scores, and ordering the objects based on respective user relationship ranking indices of the objects.
6. The method of claim 1 , wherein an equation of calculating the user relationship ranking index comprises: the user relationship ranking index=SUM (a rating score/an interpersonal distance)/a sample size.