详细解释:a. 深思的, 体贴的
词型变化：
副词:thoughtfully名词:thought-fulness词意辨析：
considerate, thoughtful, attentive这些形容词均含“关心的，体贴的”之意。
considerate: 指能设身处地为别人着想，给予同情或谅解。
thoughtful: 指为他人着想，主动关怀，做有益于他人的事。
attentive: 指对人关怀备至，热情周到，这可能出于真诚，也可能出于私利。英语解释：
形容词 thoughtful:
having intellectual depthexhibiting or characterized by careful thoughtacting with or showing thought and good sense同义词：serious-minded