desk research
noun [ U ] uk/ˈdesk rɪˌsɜːtʃ/ us/ˈdesk ˌriː.sɝːtʃ/
案头市场调研（指在办公室即可从事的市场调研工作，如阅读报告或者在网上寻找信息）
market research (= finding out what customers want) that can be done from a desk, for example reading reports or looking for information on the internet