perspicacious
adjective formal approving uk/ˌpɜː.spɪˈkeɪ.ʃəs/ us/ˌpɝː.spɪˈkeɪ.ʃəs/
聪颖的;敏锐的;有洞察力的
quick in noticing, understanding, or judging things accurately
His perspicacious grandfather had bought the land as an investment, guessing that there might be gold underground. 他睿智的祖父投资买下了这块地，认为地下可能有黄金。