Bajie did as he said. He helped the master up onto the horse, took the alms-bowl, carried the cold rice in his robe, and went straight to the door of that house.

拿著 and 兜著 are both 著 marking an action held in progress, zhe -- carrying, and keeping carried.

There was nobody at home in that house but an old woman, and when she suddenly caught sight of them she hurried out of the way.

老婆子 takes 子 as the worn-down ending, zi. 躲過 records her reaction before a word has been spoken. The sight of them is enough.

Sha Monk put his palms together and said: “Venerable mother, we are men sent by the Tang court of the Land of the East to go to the Western Heaven.

差往 is the dispatch sense, so 差 reads chāi, matching 差我上東土 in the Bodhisattva's inventory at Potalaka; an automatic reading supplies chà, the falling-short sense. 唐朝 takes 朝 at cháo, the dynasty.

“Our master is somewhat unwell. We come to your house expressly to beg a cup of hot tea-broth, so that he may take a little food.”

特拜府上 uses 府上, the polite word for another person's home -- roughly "your good house". Sha Monk's manner at this door is markedly more formal than Bajie's was at the same door an hour ago, and it works considerably less well.

The old dame said: “There was a monk with a wasting sickness here only just now who said he had been sent from the Land of the East. He has had his alms and gone. And now here is another one from the Land of the East?

The whole scene turns on Bajie's earlier disguise, and the old woman is not being unfriendly. 又有個甚麼東土的 is arithmetic: one party from the East has already been fed, and she is now being asked to believe in a second.

“There is nobody at home. Go and try somewhere else.”

別處 takes 處 at chù. Go and try somewhere else -- and the door shuts.