Answer:
Based on the given detail, "O how beautiful! how beautiful! Good-morning, grandfather!" cried Heidi, running out, the author implies that Heidi is very sensitive to beautiful surroundings. By having Heidi notice the loveliness of the day first and expressing her awe, the author suggests that Heidi has a deep appreciation for nature and her surroundings. This detail helps establish Heidi's character as someone who finds joy and beauty in the outdoors. It does not imply anything negative about her behavior towards her grandfather or her lack of politeness.