At first the people does not bluntly show gratitude to Jim, they treat what he does as his work which does not need gratitude. Later on, they learned that they must thank him for his work even if he gets paid for doing it. They should still show gratitude to him, this boosts his morale and will make him enjoy his work more.
Rainsford had dug himself in when he was in France when a seconds delay meant death.
For the introductory paragraph, you should start by introducing broad ideas about the subject at hand. In this particular case, it would be a good idea to provide some background information about Sonia Nazario and maybe a little bit of information about his biographies and editorials. Nothing in your introductory paragraph should compare or contrast the two at all...you should save this for your body paragraphs. Make sure your thesis statement is the very last sentence of your introductory paragraph...this is the most important thing when it comes to most English teachers.