英汉词典

1. （研究、检查、调查）十分小心的，极其仔细的，缜密的
    A painstaking search, examination, or investigation is done extremely carefully and thoroughly.

painstaking

    e.g. Forensic experts carried out a painstaking search of the debris.
           法医专家对残骸进行了极其仔细的搜索。