tā / shàn / yú / lì / yòng / xìn / xī / ràng / jìng / zhēng / duì / shǒu / shǐ / zhōng / chǔ / yú / gǔ / zhǎng / zhī / jiān

他善于利用信息，让竞争对手始终处于股掌之间。

He is good at using information to keep his competitors completely under his control.