To show meticulous care and attention to every detail; to leave no stone unturned in taking care of someone.
微微细；至到。没有一处细微的地方不照顾到。形容关怀、照顾得非常细心周到。
宋·魏了翁《辞免督视军马乞以参赞军事从丞相行奏札》臣窃念主忧臣辱，义不得辞，踨蹐受命，退而差辟官吏、条列事目、调遣将士，凡所以为速发之计者，靡微不周。”
Her hospitality was impeccable; she attended to every need of her guests, leaving nothing to chance.
Learn the next connected idiom: 无微不至 (wú wēi bù zhì) → 至高无上 (zhì gāo wú shàng)
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