near the sea 还是by the sea

near the sea 还是by the sea 是by the sea 还是by sea表示在海边? 辨析by the sea / at the sea by the sea 于on the sea in the sea还是on the sea 《The House by the Sea》 Nearly____of the earth____coverd by sea at sea ,by sea ,at the sea,in the sea 的意思, 为什么坐船用by sea不用by the sea Nealy____of the earth_____covered by the sea. by the sea at the seaside fly in the sea还是fly on the sea?