1. A method performed by one or more processors configured with computer-executable instructions, the method comprising: obtaining a category click rate of a query, the category click rate being a percentage of a number of clicks of a respective category to a number of all categories to which the query belongs, the obtaining a category click rate including segmenting the query to obtain one or more words, finding one or more core words among the one or more words from the query, and obtaining a category click rate of a string formed by the one or more core words as the category click rate of the query; obtaining a category click rate of published information; calculating a similarity degree between the query and the published information based on the category click rate of the query and the category click rate of the published information; and returning the published information as a successful matching result if the calculated similarity degree is higher than a first threshold.