If we are to succeed in this enterprise, we shall need to plan everything very carefully.我们要是想把这个企业办好，每一件事情都要认认真真地去计划。I need to do some heavy-duty studying.我需要进行一些认认真真的学习。He counted his money up religiously every night.他每天晚上都要认认真真地数一遍钱。She went about her preparations in a quiet businesslike way.她不声不响、认认真真去准备了。