What is the function of "This is the real Netherlands" appearing four times in the eight-volume text "The Country of Ranch" in primary schools?

The Netherlands has always been famous for its "country of flowers", "country of windmills", "country of canals" and "country of pastures". From the perspective of "the country of pasture", this paper shows the vastness, tranquility and harmony of Dutch pasture during the day, and the quietness, quietness and mystery at night: during the day, the pasture is an animal paradise, and all kinds of cattle, horses, sheep, pigs and chickens are so leisurely in the "invisible low grass". The vast grassland is undoubtedly his free kingdom, which is a good picture. Even the milkman who appeared in the evening did not break the silence of the grassland. Cows are still "serious and silent", and milkmen are even "silent". Even the ship is running smoothly. The entry and exit of vehicles and ships reflects the silence of the grassland. Until nightfall, Holland fell into silence, and it became a picture of a quiet night. The description of the text makes us see the unique terrain of Dutch pastures and canals criss-crossing, the important role of animal husbandry, especially cows and dairy products, in the Dutch national economy and people's livelihood, and the beautiful, charming and natural and harmonious landscape composed of Dutch blue sky, green grass, cattle and sheep, so the author talked about "this is the real Netherlands" four times. This is not only the author's introduction to the Dutch characteristics, but also his admiration for the beautiful scenery of the Netherlands.