信手拈来

xìnshǒu-niānlái

[toss; pick up at random; have words, materials etc.at one's fingertips and write with facility] 随手取来。 形容写文章等时词汇或材料丰富, 能熟练运用

信手拈来尽可惊。 --宋·陆游《秋风亭拜寇莱公遗像》