First, read the English article below.

It is fairly common for a bamboo plant to lose a lot of leaves when moved indoors or transplanted. As long as the new leaves at the ends of branches look healthy, the plant should recover. If those leaves drop or look unhealthy, a couple months outdoors (if climate allows) can help recovery. If your plant has been in the same place for a while, look into other possible causes:  Temperate species often drop leaves during low-light conditions. A cool, low-light dormant period in winter is good for these plants, and reduces leaf drop. The fewer green leaves there are, the less water the plant needs.  Many species drop leaves in spring (or less commonly, fall), gradually replacing them with new ones. If there's a mix of green leaves, yellow leaves, and new, unfurling leaves, the plant is probably fine. If the sides of the leaves roll inward, the plant needs watering. (Photosynthesis consumes water, so the plant is reducing it by avoiding sunlight.) If the leaves droop downward, the plant is overwatered, or the soil is not draining fast enough. Overwatering is more dangerous than under-watering. Waiting to water until the leaves curl slightly will usually not harm the plant. If your bamboo is turning yellow outside of the dormant season, this could mean several different things:  If they look dry and the tips are brown or curling upward, the plant needs more water. It may be rootbound and in need of a larger pot. Leaves that slowly become paler and more yellow usually have a nutrient deficiency. Add fertilizer with added minerals.  A sudden color change after fertilizing points to over-fertilizing. Treat this problem by removing any remaining fertilizer and watering abundantly to leach out the excess minerals. Indoor bamboo plants are more vulnerable to these problems, especially if there is low air flow in the room. If there is a light insect infestation, wash the leaves with insecticidal soap, or spray it outdoors with an insecticide spray. If this doesn't work, or if you think the plant has a disease, try to... 

Now, please write a short abstract for it in Chinese. Abstract:
竹子掉叶子的原因。 解决叶片卷曲或者下垂的问题。 应对叶子变黄的问题。 应对病虫害。