stick(doing) sth./stick at/stick to
（1）I can't stick this job any longer.
(2) I stick at my painting five hours a day.
(3) Do you always stick to your promise?
请问 stick sth., stick at sth. 与 stick to sth. 的意义和用法有什么区别?
stick sth./doing sth. 主要是指“忍受”“容忍”：
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I can't stick this dull job any longer. 这种枯燥的工作我无法再忍受下去。
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I won't stick your rudeness any longer. 我再也不能容忍你这种粗暴行为。
stick at sth. 则是指“坚持”“继续努力做某事(如学习、工作、写作、练习等)”:
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Learning any skill is largely a matter of sticking at it until you can do it better. 学习任何技能在很大程度上是一个需要坚持下去直到能够做好为止的问题。
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You can get the report written inside a week, but you'll need to stick at it. 你可以在一周内写完报告，但你必须坚持写才行。
stick to sth. 主要是指“坚持(立场、原则、观点、规则、选择、信念、决定)”“信守(合同、诺言)”。有时，也可用于“坚持(学习、练习等)”。
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Flying is simple if you stick to the rules. 如果你遵守规则,飞行是很简单的。
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I've made my decision and I'm going to stick to it. 我已作了决定，而且我会坚守这一立场。
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He insisted on sticking to his original idea ... 他执着地坚持他原先的想法……请做下面的英语试题：
Because Edgar was convinced of the accuracy of this fact, he ____ his opinion.
A. struck at B. strove for C. stuck to D. stood for(全国四级,97.6-60)