这一评论是苦心的，表现出极大用心。

The review is ___painstaking, showing great care.

他们花了几个月的时间，一丝不苟地完成了这份研究报告。

They spent months doing ___painstaking research to complete the report.

她以一丝不苟的态度完成了这份报告。

She completed the report with ___painstaking attention to detail.