Tā / zhǐ / qīng / tíng / diǎn / shuǐ / de / kàn / le / yí / biàn / zī / liào / jiù / kāi / shǐ / xià / jié / lùn

他只蜻蜓点水地看了一遍资料，就开始下结论。

He only skimmed the material superficially before drawing a conclusion.