Discount principle: when there are other reasons that seem reasonable, the cause and effect of a certain result will be discounted. Which of the following are affected by the discount principle? ['Qian has always insisted on long-distance running in the morning and exercises at least 1 hour a day, which makes everyone who knows admire endlessly.', 'Lao Cai saw a young man helping an old man to cross the road, and thought: Is this man the grandson of the old man?', 'After witnessing the quarrel between the young man and the salesperson, Xiao Du felt that the young man was too picky.', 'The temperature will drop sharply these days, and there will be heavy rainfall. The family has mobilized Xiaoyu not to go out in these days.']