摘要：

Abstract:

【Purpose/significance】In recent years, frequent public health emergencies have greatly affected the daily life of the public,

leading to the increasing popularity of users' health information search behavior. By using the query words as the entry point, it can re⁃

veal the behavior rules and patterns of college students' health information searching under real circumstances, so as to provide theo⁃

retical support for user behavior service optimization in public health emergencies.【Method/process】Through real user experiments,

this study combined mobile experience sampling method, diary method and critical incident technique, and analyzed the three dimen⁃

sions of query subject, query reconstruction strategy and query reconstruction strategy transformation from the perspective of informa⁃

tion search query word.【Result/conclusion】The results show that the topic of health information that users pay most attention to and

the search path that appears most frequently in this experiment show timeliness. Second, only 40.5% of college student users recon⁃

structed query words, and nearly 50% of college student users reconstructed query words at one time, which shows that the user's

health information search reconstruction strategy is fast. In addition, the query reconstruction strategy is highly correlated with the top⁃

ic. Again, the continuity between query word reconstruction strategies is obvious but the intersections are weak, and there is a tenden⁃

cy to transform to relevant search, and the jump path diversity of health information search strategies is obvious; Finally, the user's

health information search strategy is purpose-driven.【Innovation/limitation】Therefore, this study considers the role of realistic situa⁃

tion in the search process of users' health information and has high ecological validity.