Read the beginning of the story below and complete the story in 600-800 words.
An Unexpected Guest
Riya was terrified when she heard the news on television that an alien spaceship had landed in her city. As a precaution, her father closed all the doors and windows.
Though everyone was asleep, Riya could not sleep a wink. The thought of aliens in her city kept her mind racing. It was almost midnight when she heard the door bell ring.
By now she was really scared. She ran towards the door but her father instructed her to go back to bed. She pretended to go towards her room, but hid behind the sofa and watched her father open the door.
Her father stumbled backward, emitting an indistinct but panic noise. A flock of grosteque, bloodcurdling creatures were standing in the doorway. One can barely draw analogy between them and any earthly living thing. They were heavy-set, like ragged rocks, somewhat taller than the door, semi-transparent throughout. What stunned Riya the most was that, they didn't seem to have what humans define as "head" -- let alone eyes, nose, or even a mouth. She goggled at them, her mouth wide open. It took her great efforts to refrain from screaming, but her lips couldn't help trembling. "Would father protect me safe and sound like always? " She was not sure about the answer.
"Sorry to interrupt. We are here on a mission." A cold, machine-like sound was uttered by the one in front.
"What... what do you want?" The man, painstakingly oppressing his fret, replied in a quivering voice.
"We have long been observing the living entities on this planet, which you call earth. Years of observation point out one unquestionable fact that mankind is the best object for our study. We are perplexed, fascinated or even intoxicated by your behaviors, many of which seem utterly incomprehensible to us. That's why we've come a long way -- like decades of light years -- to be here."
"You were saying that you want to have a closer look at us?" Riya's father was regaining his calm.
"Oh, you misunderstood. It is definitely a piece of cake to get pictures and footages of everything on earth. Even at home – I mean on our planet, we can count out the hairs on your chest if we want." These words, though acridly ironic, was delivered in a monotone, devoid of any intonation that might suggest the speaker's attitude.
"So why bother to come here? Why are you here in my doorway?" Something really bad was happening, the man thought, his forehead sweating.
"What we ask of you is every simple. We know you have a daughter, who's now hiding behind the sofa." On hearing this, Riya's father threw a immediate glance at the sofa. His bloodshot eyes widened, full of agitation and agony. Hardly had her eyes met with her dad's than she cried out loud. Her heart wildly thumping, she could barely breathe. In no time, his father rushed to her, swepted her into his arms, and pressed her tight against his chest, snarling, "What the hell do you want from us? Dare you touch her!"
"Calm down. We mean no harm to you. Just need a little help for us to figure out the nature love. That is a thory problem for us: try as we did, we failed to give a definition to that intangible material peculiar to you human beings. Every now and then, we wonder what exactly is it that consititutes the so-called 'emotional bond' between parents and childern..."
"You bastard!" Yelling furiously, Riya's father darted to the speaking creature and flung a fest at it. That attack, however, was in vain. Some invisible power rebounded him back, thrusting him heavily on the wall. "Dad!" A shriek ran through the drawing room.
"Oh, don't be silly. You cannot even touch us. And we don't want us sample damaged. Spare your efforts and cooperate with us -- that is the only choice for you.We want to take away one of you two: either you or your daughter.Rest assured, the one being taken will enjoy a good life in our spacecraft." Indifferent though that voice sounded, it was piercing to the ears of the man and the girl.
"Then take me! I'll go with you, just leave my daughter alone. Promise you won't hurt her, otherwise I'll do whatever I can to make you suffer!" Almost without the sightest hesitation, the man made his decision, his eyes watering.
"No, dad, you promised you'll never leave me!" The girl desparately shouted, tears streaming down her face. Then she cuddled to her father and put her arms around him.
"I don't think that's possible. Little, girl. It's either you or him, and the decision is up to you. Fair and square."
"Alright, I'll go. My dad has been protecting me since I was born, and now I'll be his shield for the first time." The girl summmoned her courage and uttered a string of words that were no different from a deadly blow to her father.
"Riya, shut up! What are you talking about!"
After several rounds of back and forth, the father and daughter were still arguing and reaching no agreement. Out of patience, the "alien commander" erupted, giving out a beam of blinding light, which then envoloped the man and the girl.
"I think we are right. Love is dangerous, devastating, or even lethal.What silly creatures! Such affections will eventually lead to the demise of all humanity."
The father and daughter, lying together on the ground, would never part ever since.
深刻，主要是在整个文章的立意上。没有立意的文章或者故事或多或少都显得苍白了些，科幻小说也不例外。整个文章从一开始描写外星人的形态，到外星人说明来意，再到父亲从愤怒到不舍，女儿从恐惧到坚强的情感变化，环环相扣，最后堆砌出的高潮便是“the alien commander erupted, giving out a beam of blinding light, which then enveloped the man and the girl”, 之后便是画龙点睛般的一句“ Love is dangerous, devastating, or even lethal...such affections will eventually lead to the demise of all humanity”， 似总结的语言，引人深思，比如我就会不自主地想到科幻小说中常见的高深科学和人性之间的矛盾关系。当然，一千个读者心中就有一千个哈姆雷特，每个人对这篇文章的理解也不尽相同，但是作者通过这篇文章提出自己的思考，便是一大成功之处了。