文中多次写到“我”的感受，有什么作用？

按如图装置做测定空气中氧气含量的实验．

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词尾（\）划掉。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：⒈每处错误及其修改均仅限一词；

⒉只允许修改10处，多者（从第11处起）不计分。

    It was a freezing winter night. I pulled myself along the way before a long day's work stand behind the counter. An empty stomach and only ten-dollar note and a few pennies in the pocket, my life seemed hopelessly. Despite the warm Christmas atmosphere, my heart was frozen to dead. “Excuse me, Madam. Would you please be too kind as to give a few pennies? The little angels will appreciate for it.” A sweet voice rise behind me. I turned and found a plain-looking girt with two abandoned dogs. Without hesitations, I handed over the note in my pocket. Cheerfully the girl wait away and she would never know how she saved my day and my life.