殚精竭虑

Explanation: Satan: do; considered: a new life. Describe the exhausted mind. 　　Usage: Joint type; as predicate, adverbial; used for written language 　　Source: Ming Hu Ying-lin "Poetry Tau": "The use of short works, the text teaser Wan, a Chinese dried further refined endeavor can not catch those." 　　Examples: But "~ with the painstaking efforts to carefully created" out of doctrine, and we only common sense view is very different. (Lu Xun "lace merchants Literary Criticism") Thesaurus:  go to great pains, deliberately planning, work hard and carefully to keep one's business going, elaboration, painstaking accomplishment, rack one's brains, make extraordinarily painstaking efforts, lucubrate, Bruising, cudgel one's `brains think very hard, Of peaceful contemplation search for, make painstaking efforts, think twice about doing sth., Puzzle, to manage with great pain Antonym Group:  Lver Caogu, regard … as a trifling matter