adv立即，毫不迟疑地 (at once，without hesitation)：His answer came～. 他立即回答。

have/know sth off pat 记得或了解得很清楚：He has the story off～.他对这个故事熟悉得可一字不漏地讲出来。

stand pat (尤AmE) 坚持自己的决定、意见等：He stood～on his political stand.他坚持自己的政治立场。

adj (1)恰好(当)的;适(时)的 (exactly to the point or purpose)： a～reply/answer 妥贴的回答;There are no～solutions to all the world's problems. 没有解决世界上所有问题的办法。〖同〗perfect，ideal，appropriate; 〖反〗imperfect;

(2)过快的;伶牙俐齿的;油嘴滑舌的 (too quick)(derog)：The ending of the story was too～.故事的结局太突然了。 a～answer for everything一个现成的万金油答案;The statesman had～answers to all my objections. 那位政治家对我提出的所有异议都脱口而出，一一作答。〖同〗ready，smooth