I think you should understand what it means for a text to have 'textual integrity' first.
In a very general sense, evaluating a text's sense of 'textual integrity'' is evaluating the text in a whole - such as, the distinctiveness of her speech, concept/s, implementation of her own experiences of injustice, mode of delivery, connection with her audience - how these elements, and many more, may contribute to the success in conveying her message/s (meaning) to her audience, and may unify the text.
I think something that you should help you is breaking down the rubric for the speeches module, and really understanding what this speech is about - it is complex, and Suu Kyi explores so many ideas in so many different ways, and i think that you should get a good grasp of them before you begin to write an essay etc.
So in answering your question -you need to examine and analyse the text as a whole (use various examples) before deducing whether or not a text holds 'high' textual integrity. It's not a matter of picking it out of a paragraph like you would with finding a metaphor.