The key step of Gram staining is ____（）
A. Crystal Violet First Stain
B. Iodine Mordant
C. Alcohol decolorization
D. Saffron counterstain
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Which of the following alterations can appear after ligating the torso（）
A. Increased capillary hydrostatic pressure
B. Increased crystal osmolality in plasma
C. Increased microvascular permeability
D. Obstruction of lymphatic drainage
Among the following statements of pathogenesis of imbalance of internal and external vascular fluid exchange, which one is incorrect（）
A. Increased capillary hydrostatic pressure
B. Increased crystal osmolality in plasma
C. Increased microvascular permeability
Decreased colloid osmotic pressure in plasma
Among the mechanisms of the imbalance of fluid exchange, Vivo-sodium and water retention, which is incorrect（）
A. GFR decreases
B. Decreases in atrial natriuretic peptide secretion
C. A low level of glomerular filtration fraction
D. Increased aldosterone secretion
Edema is（）
A. Excessive intracellular fluid
B. Excess extracellular fluid
C. Excessive fluid in tissue spaces or body cavity
D. Excessive intravascular fluid
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